The capacity of a parallel plate capacitor increases with the
|
(a) Decrease of its area |
(b) Increase of its distance |
|
(c) Increase of its area |
(d) None of the above |
(c) Increase of its area
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A strip of copper and another of germanium are cooled from room temperature to 80 K. The resistance of
|
(a) Each of these increases |
|
(b) Each of these decreases |
|
(c) Copper strip increases and that of germanium decreases |
|
(d) Copper strip decreases and that of germanium increases |
The age of universe is believed to be
|
(a) 1 billion years |
(b) 10 billion years |
(c) 10-20 billion years |
(d) 1000 billion years |
A wire of length L metre carrying a current of I ampere is bent in the form of a circle. Its magnitude of magnetic moment will be
|
(a) |
(b) |
(c) |
(d) |
A 100 watt bulb working on 200 volt and a 200 watt bulb working on 100 volt have
|
(a) Resistances in the ratio of 4 : 1 |
|
(b) Maximum current ratings in the ratio of 1 : 4 |
|
(c) Resistances in the ratio of 2 : 1 |
|
(d) Maximum current ratings in the ratio of 1 : 2 |
The triode constant is out of the following
|
(a) Plate resistance |
(b) Amplification factor |
(c) Mutual conductance |
(d) All the above |
