- AStore electrical energy.
- BBuild up high voltage of few million volts.
- CDecelerate charged particle like electrons.
- DBoth (a) and (b).
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The value of the horizontal component of the earth's magnetic field and angle of dip are 1.8 and 30° respectively at some place. The total intensity of earth's magnetic field at that place will be
|
(a) 2.08 |
(b) 3.67 |
|
(c) 3.18 |
(d) 5.0 |
The bob of a simple pendulum is replaced by a magnet. The oscillations are set along the length of the magnet. A copper coil is added so that one pole of the magnet passes in and out of the coil. The coil is short-circuited. Then which one of the following happens
| (a) Period decreases | (b) Period does not change |
| (c) Oscillations are damped | (d) Amplitude increases |
Plate resistance of two triode valves is 2 KW and 4 KW, amplification factor of each of the valves is 40. The ratio of voltage amplification, when used with 4 KW load resistance, will be
|
(a) 10 |
(b) |
(c) |
(d) |
According to corpuscular theory of light, the different colours of light are due to
|
(a) Different electromagnetic waves |
|
(b) Different force of attraction among the corpuscles |
|
(c) Different size of the corpuscles |
|
(d) None of the above |
Assertion : The presence of water molecules makes separation of ions easier in electrolyte.
Reason : The presence of water molecules in electrolyte decreases the resistance of electrolyte.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be
|
(a) 2 V |
(b) 1 V |
(c) 0.5 V |
(d) Zero |