Two waves have their amplitudes in the ratio 1 : 9. The maximum and minimum intensities when they interfere are in the ratio
|
(a) |
(b) |
(c) |
(d) |
(a) 
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If the magnetic flux is expressed in weber, then magnetic induction can be expressed in
|
(a) Weber/m2 |
(b) Weber/m |
(c) Weber-m |
(d) Weber-m2 |
The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the resistor is
|
(a) 21 × 103 ± 10% |
(b) 23 × 101 ± 10 % |
(c) 21 × 103 ± 5% |
(d) 12 × 103 ± 5% |
An electron experiences a force equal to its weight when placed in an electric field. The intensity of the field will be
|
(a) 1.7 |
(b) 5.0 |
(c) 5.5 |
(d) 56 N/C |
The current in the arm CD of the circuit will be
(a) 
|
(b) 
|
(c) |
(d) |
A monochromatic beam of light passes from a denser medium into a rarer medium. As a result
|
(a) Its velocity increases |
(b) Its velocity decreases |
|
(c) Its frequency decreases |
(d) Its wavelength decreases |
When a battery is connected across a series combination of self inductance L and resistance R, the variation in the current i with time t is best represented by
|
(a)
|
(b)
|
(c)
|
(d) |
