- AThe electric force between them increases.
- BThe electric force between them decreases.
- CThe net downward force will increase.
- DThe net downward force will remain unchanged.
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Assertion : Cyclotron is a device which is used to accelerate the positive ion.
Reason : Cyclotron frequency depends upon the velocity.
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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 resistance of an ideal ammeter is
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(a) Infinite |
(b) Very high |
(c) Small |
(d) Zero |
The error in measuring the current with a tangent galvanometer is minimum when the deflection is about
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(a) 0o |
(b) 30o |
(c) 45o |
(d) 60o |
The two waves represented by y1 = a sin(wt) and have a phase difference of
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(a) 0 |
(b) |
(c) |
(d) |
In intrinsic semiconductor at room temperature, number of electrons and holes are
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(a) Equal |
(b) Zero |
(c) Unequal |
(d) Infinite |

A charged particle of mass m and charge q describes circular motion of radius r in a uniform magnetic field of strength B. The frequency of revolution is
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(a) |
(b) |
(c) |
(d) |