tag:blogger.com,1999:blog-27698739534958796222024-02-28T07:31:06.577+05:30MCQ Answers Guru.PhysicsKerala.inUnknownnoreply@blogger.comBlogger596125tag:blogger.com,1999:blog-2769873953495879622.post-82823860170793354592020-09-06T17:02:00.004+05:302020-09-06T17:14:53.394+05:30A charged rod is touched to a small metallic sphere placed at the origin. This is done at time t = 0. A sensitive field detector detects the electric fields at points 10 cm away and 50 cm away at time t = 1 nanosecond<div style="text-align: justify;"><span style="background-color: white; caret-color: rgb(4, 96, 81); font-family: times; font-size: 19.200000762939453px;">A charged rod is touched to a small metallic sphere placed at the origin. This is done at time </span><em style="caret-color: rgb(4, 96, 81); font-family: times; font-size: 19.200000762939453px; outline: 0px;">t</em><span style="background-color: white; caret-color: rgb(4, 96, 81); font-family: times; font-size: 19.200000762939453px;"> = 0. A sensitive field detector detects the electric fields at points 10 cm away and 50 cm away at time </span><em style="caret-color: rgb(4, 96, 81); font-family: times; font-size: 19.200000762939453px; outline: 0px;">t</em><span style="background-color: white; caret-color: rgb(4, 96, 81); font-family: times; font-size: 19.200000762939453px;"> = 1 nanosecond.</span></div><span style="font-family: times;"><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;">The expression of Coulomb’s law can match the measured value </span><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;">(a) at 10 cm point but not at 50 cm point</span><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;">(b) at 50 cm point but not at 10 cm point</span><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;">(c) both at 50 cm point and at 10 cm point</span><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><br style="caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px; outline: 0px;" /><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;">(d) neither at 50 cm point nor at 10 cm point</span></span><div><span style="font-family: times;"><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;"><br /></span></span></div><div style="text-align: center;"><span style="font-family: times;"><span style="background-color: white; caret-color: rgb(4, 96, 81); font-size: 19.200000762939453px;"><a href="https://mcc.physicskerala.in/mcq/enrol/index.php?id=22" rel="nofollow" target=""><b>>>>>>>>></b></a></span></span></div><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-4688892426426216822020-04-23T00:50:00.000+05:302020-04-23T00:50:32.098+05:30If the doping level in a crystal diode is increased, the width of depletion layer ____. (Correct Answer)<div dir="ltr" style="text-align: left;" trbidi="on">
<strong>Question : </strong> If the doping level in a crystal diode is increased, the width of depletion layer ____<br />
(A). remains the same<br />
(B). is decreased<br />
(C). is increased<br />
(D). none of the above<br />
<button id="buttgpvas559" onclick="myFunctiongpvas559()">Show Answer</button> <script> function myFunctiongpvas559() { document.getElementById("buttgpvas559").innerHTML = "Answer is <strong>B</strong><br/>The physical width of the depletion region depends on the doping level. If very heavy doping is used, the depletion region is physically thin because diffusion charge need not travel far across the junction before recombination takes place (short life time). If doping is light, then depletion is more wide (long life time)."; } </script> </div><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-82502503059547804652019-12-23T22:51:00.000+05:302019-12-23T22:53:28.970+05:30Metric coefficients of Spherical Polar coordinates<div dir="ltr" style="text-align: left;" trbidi="on">
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<div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-14840997173450757892019-08-11T17:31:00.000+05:302019-08-11T17:34:26.724+05:30A Carnot engine whose low temperature reservoir is at 7 degree Celsius has an efficiency of 50%. If it is desired to increase the efficiency to 70%, by how many degrees should the temperature of the high temperature reservoir be increased ?<div dir="ltr" style="text-align: left;" trbidi="on">
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<div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-66308444309392709402016-08-28T15:04:00.019+05:302016-08-28T15:05:21.464+05:30Electron in the atom are held in the atom due to<P><STRONG>Question : </STRONG> Electron in the atom are held in the atom due to</P> <p></p> <P>(A). coulombs force</P> <P>(B). nuclear force</P> <P>(C). atomic force</P> <P>(D). coulombs and nuclear force</P><BUTTON onclick=myFunctiongp556() id=buttgp556>Show Answer</BUTTON> <SCRIPT> function myFunctiongp556() { document.getElementById("buttgp556").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-77716519602769104802016-08-28T15:04:00.018+05:302016-08-28T15:05:15.087+05:30In the formula of the angular momentum L = rxp (p) denotes the<P><STRONG>Question : </STRONG> In the formula of the angular momentum L xp (p) denotes the</P> <p></p> <P>(A). displacement</P> <P>(B). power</P> <P>(C). momentum</P> <P>(D). speed</P><BUTTON onclick=myFunctiongp576() id=buttgp576>Show Answer</BUTTON> <SCRIPT> function myFunctiongp576() { document.getElementById("buttgp576").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-65348713958804680972016-08-28T15:04:00.017+05:302016-08-28T15:05:08.916+05:30The first linear equation of motion is represented as<P><STRONG>Question : </STRONG> The first linear equation of motion is represented as</P> <p></p> <P>(A). Vi f + at</P> <P>(B). Vf i-at</P> <P>(C). Vf i + at</P> <P>(D). Vf i + a</P><BUTTON onclick=myFunctiongp570() id=buttgp570>Show Answer</BUTTON> <SCRIPT> function myFunctiongp570() { document.getElementById("buttgp570").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-23657384726565424932016-08-28T15:04:00.016+05:302016-08-28T15:05:03.067+05:30If the turns ratio of transformer is 10 it means that<P><STRONG>Question : </STRONG> If the turns ratio of transformer is 10 it means that</P> <p></p> <P>(A). Is 0 Ip</P> <P>(B). Ip 0 Is</P> <P>(C). Ns 0 Np</P> <P>(D). Is Ip and Ip Is</P><BUTTON onclick=myFunctiongp572() id=buttgp572>Show Answer</BUTTON> <SCRIPT> function myFunctiongp572() { document.getElementById("buttgp572").innerHTML = "Answer is <strong>D</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-37469183858137616982016-08-28T15:04:00.015+05:302016-08-28T15:04:56.855+05:30The gate whose output is 0 only when the inputs are different is called<P><STRONG>Question : </STRONG> The gate whose output is 0 only when the inputs are different is called</P> <p></p> <P>(A). XOR</P> <P>(B). XNOR</P> <P>(C). NOR</P> <P>(D). NAND</P><BUTTON onclick=myFunctiongp530() id=buttgp530>Show Answer</BUTTON> <SCRIPT> function myFunctiongp530() { document.getElementById("buttgp530").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-91039220036429995802016-08-28T15:04:00.013+05:302016-08-28T15:04:51.226+05:30In 1909 Millikan devised the technique for measurement of<P><STRONG>Question : </STRONG> In 1909 Millikan devised the technique for measurement of</P> <p></p> <P>(A). charge on electron</P> <P>(B). charge on cathode</P> <P>(C). charge on neutron</P> <P>(D). charge on proton</P><BUTTON onclick=myFunctiongp574() id=buttgp574>Show Answer</BUTTON> <SCRIPT> function myFunctiongp574() { document.getElementById("buttgp574").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-66678311231123630262016-08-28T15:04:00.011+05:302016-08-28T15:04:44.460+05:30At low temperature a body emits radiation of<P><STRONG>Question : </STRONG> At low temperature a body emits radiation of</P> <p></p> <P>(A). shorter wave length</P> <P>(B). high frequencies</P> <P>(C). longer wavelength</P> <P>(D). low frequencies</P><BUTTON onclick=myFunctiongp573() id=buttgp573>Show Answer</BUTTON> <SCRIPT> function myFunctiongp573() { document.getElementById("buttgp573").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-31652670632258034952016-08-28T15:04:00.009+05:302016-08-28T15:04:39.215+05:30In a PNP transistor the n-region as compared to the p-region is<P><STRONG>Question : </STRONG> In a PNP transistor the n-region as compared to the p-region is</P> <p></p> <P>(A). smaller</P> <P>(B). larger</P> <P>(C). same</P> <P>(D). negligible</P><BUTTON onclick=myFunctiongp564() id=buttgp564>Show Answer</BUTTON> <SCRIPT> function myFunctiongp564() { document.getElementById("buttgp564").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-28372300732775826642016-08-28T15:04:00.007+05:302016-08-28T15:04:32.477+05:30The change in kinetic energy is measured as the difference of<P><STRONG>Question : </STRONG> The change in kinetic energy is measured as the difference of</P> <p></p> <P>(A). 1/2(mv)�</P> <P>(B). (mv)�</P> <P>(C). 1/2(mv)</P> <P>(D). 1/2(m)�</P><BUTTON onclick=myFunctiongp571() id=buttgp571>Show Answer</BUTTON> <SCRIPT> function myFunctiongp571() { document.getElementById("buttgp571").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-38389863843714306602016-08-28T15:04:00.005+05:302016-08-28T15:04:26.436+05:30Changing current in a coil produces emf in the same coil is known as<P><STRONG>Question : </STRONG> Changing current in a coil produces emf in the same coil is known as</P> <p></p> <P>(A). mutual induction</P> <P>(B). self induction</P> <P>(C). induced emf</P> <P>(D). emf</P><BUTTON onclick=myFunctiongp559() id=buttgp559>Show Answer</BUTTON> <SCRIPT> function myFunctiongp559() { document.getElementById("buttgp559").innerHTML = "Answer is <strong>B</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-41374162153142796542016-08-28T15:04:00.003+05:302016-08-28T15:04:19.901+05:30According to the system international the length of the substance is measured in<P><STRONG>Question : </STRONG> According to the system international the length of the substance is measured in</P> <p></p> <P>(A). moles</P> <P>(B). seconds</P> <P>(C). meters</P> <P>(D). kelvin</P><BUTTON onclick=myFunctiongp555() id=buttgp555>Show Answer</BUTTON> <SCRIPT> function myFunctiongp555() { document.getElementById("buttgp555").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-4791929267384178802016-08-28T15:04:00.001+05:302016-08-28T15:04:15.609+05:30Zero digit is the only digit that<P><STRONG>Question : </STRONG> Zero digit is the only digit that</P> <p></p> <P>(A). maybe significant</P> <P>(B). may not be significant</P> <P>(C). is significant</P> <P>(D). both maybe and may not be significant</P><BUTTON onclick=myFunctiongp528() id=buttgp528>Show Answer</BUTTON> <SCRIPT> function myFunctiongp528() { document.getElementById("buttgp528").innerHTML = "Answer is <strong>D</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-90698897403869640832016-08-28T14:55:00.007+05:302016-08-28T14:55:36.916+05:30At low temperature a body emits radiation of<P><STRONG>Question : </STRONG> At low temperature a body emits radiation of</P> <p></p> <P>(A). shorter wave length</P> <P>(B). high frequencies</P> <P>(C). longer wavelength</P> <P>(D). low frequencies</P><BUTTON onclick=myFunctiongp573() id=buttgp573>Show Answer</BUTTON> <SCRIPT> function myFunctiongp573() { document.getElementById("buttgp573").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-47461378994595184932016-08-28T14:55:00.005+05:302016-08-28T14:55:30.199+05:30In 1909 Millikan devised the technique for measurement of<P><STRONG>Question : </STRONG> In 1909 Millikan devised the technique for measurement of</P> <p></p> <P>(A). charge on electron</P> <P>(B). charge on cathode</P> <P>(C). charge on neutron</P> <P>(D). charge on proton</P><BUTTON onclick=myFunctiongp574() id=buttgp574>Show Answer</BUTTON> <SCRIPT> function myFunctiongp574() { document.getElementById("buttgp574").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-55069100885641037842016-08-28T14:55:00.003+05:302016-08-28T14:55:23.742+05:30If the turns ratio of transformer is 10 it means that<P><STRONG>Question : </STRONG> If the turns ratio of transformer is 10 it means that</P> <p></p> <P>(A). Is 0 Ip</P> <P>(B). Ip 0 Is</P> <P>(C). Ns 0 Np</P> <P>(D). Is Ip and Ip Is</P><BUTTON onclick=myFunctiongp572() id=buttgp572>Show Answer</BUTTON> <SCRIPT> function myFunctiongp572() { document.getElementById("buttgp572").innerHTML = "Answer is <strong>D</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-17889541635215288652016-08-28T14:55:00.001+05:302016-08-28T14:55:19.806+05:30In the formula of the angular momentum L = rxp (p) denotes the<P><STRONG>Question : </STRONG> In the formula of the angular momentum L xp (p) denotes the</P> <p></p> <P>(A). displacement</P> <P>(B). power</P> <P>(C). momentum</P> <P>(D). speed</P><BUTTON onclick=myFunctiongp576() id=buttgp576>Show Answer</BUTTON> <SCRIPT> function myFunctiongp576() { document.getElementById("buttgp576").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-3715901804651945902016-08-28T14:54:00.022+05:302016-08-28T14:55:33.581+05:30According to the system international the length of the substance is measured in<P><STRONG>Question : </STRONG> According to the system international the length of the substance is measured in</P> <p></p> <P>(A). moles</P> <P>(B). seconds</P> <P>(C). meters</P> <P>(D). kelvin</P><BUTTON onclick=myFunctiongp555() id=buttgp555>Show Answer</BUTTON> <SCRIPT> function myFunctiongp555() { document.getElementById("buttgp555").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-62689765618065701602016-08-28T14:54:00.021+05:302016-08-28T14:55:27.122+05:30The first linear equation of motion is represented as<P><STRONG>Question : </STRONG> The first linear equation of motion is represented as</P> <p></p> <P>(A). Vi f + at</P> <P>(B). Vf i-at</P> <P>(C). Vf i + at</P> <P>(D). Vf i + a</P><BUTTON onclick=myFunctiongp570() id=buttgp570>Show Answer</BUTTON> <SCRIPT> function myFunctiongp570() { document.getElementById("buttgp570").innerHTML = "Answer is <strong>C</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-78831571974587007242016-08-28T14:54:00.020+05:302016-08-28T14:55:16.378+05:30In a PNP transistor the n-region as compared to the p-region is<P><STRONG>Question : </STRONG> In a PNP transistor the n-region as compared to the p-region is</P> <p></p> <P>(A). smaller</P> <P>(B). larger</P> <P>(C). same</P> <P>(D). negligible</P><BUTTON onclick=myFunctiongp564() id=buttgp564>Show Answer</BUTTON> <SCRIPT> function myFunctiongp564() { document.getElementById("buttgp564").innerHTML = "Answer is <strong>A</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2769873953495879622.post-25549571876151376542016-08-28T14:54:00.019+05:302016-08-28T14:55:12.529+05:30Changing current in a coil produces emf in the same coil is known as<P><STRONG>Question : </STRONG> Changing current in a coil produces emf in the same coil is known as</P> <p></p> <P>(A). mutual induction</P> <P>(B). self induction</P> <P>(C). induced emf</P> <P>(D). emf</P><BUTTON onclick=myFunctiongp559() id=buttgp559>Show Answer</BUTTON> <SCRIPT> function myFunctiongp559() { document.getElementById("buttgp559").innerHTML = "Answer is <strong>B</strong>"; } </SCRIPT> </TD></TR></TBODY></TABLE></td></tr></tbody></table><div class="blogger-post-footer">www.physicskerala.blogspot.com</div>Unknownnoreply@blogger.com0