D:-zero
Correct Answer:- Option-D
Question64:-When a particle of rest mass m attains the velocity of light, its mass becomes

Correct Answer:- Option-C
Question65:-For a conservative system, the slop of the potential energy versus position curve gives
A:-kinetic energy
B:-force
C:-power
D:-momentum
Correct Answer:- Option-B
Question66:-Are two simultaneous events, happening at the same point, simultaneous in all inertial frames 7
ಮಿ ४65
B:-no
C:-depends on the velocity of the frames
D:-none of these
Correct Answer:- Option-A
Question67:-The critical field of a superconductor at the critical temperature is

D:-depends on the superconductor
Correct Answer:- Option-B

Question68:-In a C60 fullerence molecule, how many pentagonal sides exist 7
2:-24
B:-6
£:-20
0:-12
Correct Answer:- Option-D

Question69:-The open circuit voltage of a solar cell
A:-Increases with temperature first and then decreases
B:-decreases with temperature first and then increases
C:-Decreases with temperature
D:-Increases with temperature
Correct Answer:- Option-C

Question70:-The bandwidth of an amplifier is the range of frequencies at the limits of which its voltage gain falls by
from the maximum gain.

A:-1dB
B:-3 dB
6:94
D:-70 dB
Correct Answer:- Option-B
Question71:-Which transistor configuration ‏کا‎ commonly used for impedance matching 7
A:-common emitter
B:-common base
C:-common collector
D:-common mode
Correct Answer:- Option-C
Question72:-What is the hybridization in graphene 7
ಹಿಂ
B:-sp2
C:sp3
D:-sp4
Correct Answer:- Option-B
Question73:-What happens to the X-ray diffraction peaks from a polycrystalline solid, when its crystalline size 66೧೧೩565 7
A:-become broad