- ARest mass.
- BMomentum.
- CEnergy.
- DFrequency.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Whenever light travels from denser medium to a rarer medium:
The energy of a charged capacitor is given by the expression (q = charge on the conductor and C = its capacity)
|
(a) |
(b) |
(c) 2qC |
(d) |
A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current I is established in wire as shown in figure, the loop will
| (a) Rotate about an axis parallel to the wire |
| (b) Move away from the wire or towards right |
| (c) Move towards the wire |
| (d) Remain stationary |
A heater coil is cut into two parts of equal length and one of them is used in the heater. The ratio of the heat produced by this half coil to that by the original coil is
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 1 : 4 |
(d) 4 : 1 |
In the CB mode of a transistor, when the collector voltage is changed by 0.5 volt. The collector current changes by 0.05 mA. The output resistance will be
|
(a) 10 kW |
(b) 20 kW |
(c) 5 kW |
(d) 2.5 kW |
The work function of metal is 1 eV. Light of wavelength 3000 Å is incident on this metal surface. The velocity of emitted photo-electrons will be
|
(a) 10 m/sec |
(b) 1 |
(c) |
(d) |