- AGe
- ✓CdS
- Canthracene
- Dpolyanilie
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Five resistors of given values are connected together as shown in the figure. The current in the arm BD will be
|
(a) Half the current in the arm ABC |
(b) Zero |
|
(c) Twice the current in the arm ABC |
(d) Four times the current in the arm ABC |
Laser beams are used to measure long distances because
|
(a) They are monochromatic |
(b) They are highly polarised |
|
(c) They are coherent |
(d) They have high degree of parallelism |
A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance (d) of the source from the emitter

|
(a) a |
(b) b |
(c) c |
(d) d |

In the propagation of electromagnetic waves the angle between the direction of propagation and plane of polarisation is
|
(a) 0o |
(b) 45o |
(c) 90o |
(d) 180o |
Among the two interfering monochromatic sources A and B; A is ahead of B in phase by 66°. If the observation be taken from point P, such that PB – PA = l/4. Then the phase difference between the waves from A and B reaching P is
|
(a) 156° |
(b) 140° |
(c) 136° |
(d) 126° |
Three capacitors of 2.0, 3.0 and 6.0 μF are connected in series to a 10 V source. The charge on the 3.0 μF capacitor is
|
(a) 5 μC |
(b) 10 μC |
(c) 12 μC |
(d) 15 μC |