- ARemain the same.
- BIncrease.
- CDecrease.
- DFluctuate.
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In the adjoining circuit, the battery has an e.m.f of 12 volt and zero internal resistance while the battery E has an e.m.f of 2 volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is
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(a) 10 |
(b) 100 |
(c) 500 |
(d) 200 |
A charged particle moves in a uniform magnetic field. The velocity of the particle at some instant makes an acute angle with the magnetic field. The path of the particle will be
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(a) A straight line |
(b) A circle |
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(c) A helix with uniform pitch |
(d) A helix with non-uniform pitch |

Out of the following statements which is not correct
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(a) When unpolarised light passes through a Nicol's prism, the emergent light is elliptically polarised |
|
(b) Nicol's prism works on the principle of double refraction and total internal reflection |
|
(c) Nicol's prism can be used to produce and analyse polarised light |
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(d) Calcite and Quartz are both doubly refracting crystals |
The transition from the state n = 4 to n = 3 in a hydrogen-like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition
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(a) 2 → 1 |
(b) 3 → 2 |
(c) 4 → 2 |
(d) 5 → 4 |