For a common base configuration of PNP transistor 
then maximum current gain in common emitter configuration will be
|
(a) 12 |
(b) 24 |
(c) 6 |
(d) 5 |
(b) 24
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For a triode, at 
volt, the following observations were taken
, 
. The value of plate resistance will be
|
(a) 25 kW |
(b) 20.8 kW |
(c) 12.5 kW |
(d) 100 kW |
Two magnets A and B are identical in mass, length and breadth but have different magnetic moments. In a vibration magnetometer, if the time period of B is twice the time period of A. The ratio of the magnetic moments 
of the magnets will be
| (a) 1/2 | (b) 2 | (c) 4 | (d) 1/4 |
When a 
atom is bombarded with α - particles, one of the product of nuclear transmutation is 
. The other is
|
(a) |
(b) |
(c) |
(d) |
It is desired to photograph the image of an object placed at a distance of 3m from the plane mirror. The camera which is at a distance of 4.5 m from the mirror should be focussed for a distance of
| (a) 3m | (b) 4.5m | (c) 6m | (d) 7.5 m |
A current carrying solenoid is approaching a conducting loop as shown in the figure. The direction of induced current as observed by an observer on the other side of the loop will be
|
(a) Anticlockwise |
(b) Clockwise |
(c) East |
(d) West |
