►- A 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

►- If the doping level in a crystal diode is increased, the width of depletion layer ____. (Correct Answer)

►- Metric coefficients of Spherical Polar coordinates

►- A 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 ?

►- Find the mass of electron and kinetic energy of an electron moving with a velocity 0.99 c

►- Electron in the atom are held in the atom due to

Question : Electron in the atom are held in the atom due to

(A). coulombs force

(B). nuclear force

(C). atomic force

(D). coulombs and nuclear force

►- In the formula of the angular momentum L = rxp (p) denotes the

Question : In the formula of the angular momentum L xp (p) denotes the

(A). displacement

(B). power

(C). momentum

(D). speed

►- The first linear equation of motion is represented as

Question : The first linear equation of motion is represented as

(A). Vi f + at

(B). Vf i-at

(C). Vf i + at

(D). Vf i + a

►- If the turns ratio of transformer is 10 it means that

Question : If the turns ratio of transformer is 10 it means that

(A). Is 0 Ip

(B). Ip 0 Is

(C). Ns 0 Np

(D). IsIp and IpIs

►- The gate whose output is 0 only when the inputs are different is called

Question : The gate whose output is 0 only when the inputs are different is called

(A). XOR

(B). XNOR

(C). NOR

(D). NAND

►- In 1909 Millikan devised the technique for measurement of

Question : In 1909 Millikan devised the technique for measurement of

(A). charge on electron

(B). charge on cathode

(C). charge on neutron

(D). charge on proton

►- At low temperature a body emits radiation of

Question : At low temperature a body emits radiation of

(A). shorter wave length

(B). high frequencies

(C). longer wavelength

(D). low frequencies

►- In a PNP transistor the n-region as compared to the p-region is

Question : In a PNP transistor the n-region as compared to the p-region is

(A). smaller

(B). larger

(C). same

(D). negligible

►- The change in kinetic energy is measured as the difference of

Question : The change in kinetic energy is measured as the difference of

(A). 1/2(mv)�

(B). (mv)�

(C). 1/2(mv)

(D). 1/2(m)�

►- Changing current in a coil produces emf in the same coil is known as

Question : Changing current in a coil produces emf in the same coil is known as

(A). mutual induction

(B). self induction

(C). induced emf

(D). emf

►- According to the system international the length of the substance is measured in

Question : According to the system international the length of the substance is measured in

(A). moles

(B). seconds

(C). meters

(D). kelvin

►- Zero digit is the only digit that

Question : Zero digit is the only digit that

(A). maybe significant

(B). may not be significant

(C). is significant

(D). both maybe and may not be significant

►- At low temperature a body emits radiation of

Question : At low temperature a body emits radiation of

(A). shorter wave length

(B). high frequencies

(C). longer wavelength

(D). low frequencies

►- In 1909 Millikan devised the technique for measurement of

Question : In 1909 Millikan devised the technique for measurement of

(A). charge on electron

(B). charge on cathode

(C). charge on neutron

(D). charge on proton

►- If the turns ratio of transformer is 10 it means that

Question : If the turns ratio of transformer is 10 it means that

(A). Is 0 Ip

(B). Ip 0 Is

(C). Ns 0 Np

(D). IsIp and IpIs