The minimum frequency v of continuous X-rays is related to the applied potential difference V as
|
(a) v ∝ |
(b) v ∝ v |
(c) v ∝ |
(d) v ∝ |
The minimum frequency v of continuous X-rays is related to the applied potential difference V as
|
(a) v ∝ |
(b) v ∝ v |
(c) v ∝ |
(d) v ∝ |
(b) v ∝ v
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If an ammeter is to be used in place of a voltmeter then we must connect with the ammeter a
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(a) Low resistance in parallel |
(b) High resistance in parallel |
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(c) High resistance in series |
(d) Low resistance in series |
Assertion : Charge is invariant.
Reason : Charge does not depends on speed of frame of reference.
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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. |
Two batteries of e.m.f. 4V and 8 V with internal resistances 1 W and 2 W are connected in a circuit with a resistance of 9 W as shown in figure. The current and potential difference between the points P and Q are
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(a) |
(b) |
(c) |
(d) |
A 4μF conductor is charged to 400 volts and then its plates are joined through a resistance of 1kΩ. The heat produced in the resistance is
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(a) 0.16 J |
(b) 1.28 J |
(c) 0.64 J |
(d) 0.32 J |
A ray of light is incidenting normally on a plane mirror. The angle of reflection will be
| (a) 0° | (b) 90° |
| (c) Will not be reflected | (d) None of the above |