An electron and a proton with equal momentum enter perpendicularly into a uniform magnetic field, then
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(a) The path of proton shall be more curved than that of electron |
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(b) The path of proton shall be less curved than that of electron |
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(c) Both are equally curved |
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(d) Path of both will be straight line |
(c) Both are equally curved
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Assertion : Faraday’s laws are consequences of conservation of energy.
Reason : In a purely resistive ac circuit, the current lags behind the e.m.f. in phase.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(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. |
The magnetic field at the centre of a circular coil of radius r carrying current I is 
. The field at the centre of another coil of radius 2 r carrying same current I is 
. The ratio 
is
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(a) |
(b) 1 |
(c) 2 |
(d) 4 |
The kinetic energy of an electron revolving around a nucleus will be
| (a) Four times of P.E. | (b) Double of P.E. | (c) Equal to P.E. | (d) Half of its P.E. |
What will be the ratio of de-Broglie wavelengths of proton and α - particle of same energy
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(a) 2 : 1 |
(b) 1 : 2 |
(c) 4 : 1 |
(d) 1 : 4 |
