Vibration magnetometer is used for comparing
|
(a) Magnetic fields |
(b) Earth's field |
(c) Magnetic moments | (d) All of the above |
Vibration magnetometer is used for comparing
|
(a) Magnetic fields |
(b) Earth's field |
(c) Magnetic moments | (d) All of the above |
(d) All of the above
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Assertion : Penetrating power of X-rays increases with the increasing the wavelength.
Reason : The penetrating power of X-rays increases with the frequency of X-rays.
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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 assertion is false but reason is true. |
Two free parallel wires carrying currents in opposite direction
| (a) Attract each other |
| (b) Repel each other |
| (c) Neither attract nor repel |
| (d) Get rotated to be perpendicular to each other |
The relaxation time in conductors
|
(a) Increases with the increase of temperature |
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(b) Decreases with the increase of temperature |
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(c) It does not depend on temperature |
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(d) All of sudden changes at 400 K |
The focal length of a convex mirror is 20 cm its radius of curvature will be
|
(a) 10 cm |
(b) 20 cm |
(c) 30 cm |
(d) 40 cm |
Assertion : The capacity of a given conductor remains same even if charge is varied on it.
Reason : Capacitance depends upon nearly medium as well as size and shape of conductor.
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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. |
If in the circuit shown below, the internal resistance of the battery is 1.5 W and VP and VQ are the potentials at P and Q respectively, what is the potential difference between the points P and Q
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(a) Zero |
(b) 4 volts (VP > VQ) |
(c) 4 volts (VQ > VP) |
(d) 2.5 volts (VQ > VP) |