Among the following properties describing diamagnetism identify the property that is wrongly stated
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(a) Diamagnetic material do not have permanent magnetic moment |
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(b) Diamagnetism is explained in terms of electromagnetic induction |
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(c) Diamagnetic materials have a small positive susceptibility |
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(d) The magnetic moment of individual electrons neutralize each other |
(c) Diamagnetic materials have a small positive susceptibility
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A capacitor is used to store 24 watt hour of energy at 1200 volt. What should be the capacitance of the capacitor
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(a) 120 mF |
(b) 120 μF |
(c) 24 μF |
(d) 24 mF |
When electron beam passes through an electric field, they gain kinetic energy. If the same beam passes through magnetic field, then
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(a) Their energy increases |
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(b) Their momentum increases |
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(c) Their potential energy increases |
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(d) Energy and momentum both remains unchanged |
The magnetic susceptibility is
|
(a) |
(b) |
(c) |
(d) |
The time period of oscillation of a magnet in a vibration magnetometer is 1.5 seconds. The time period of oscillation of another magnet similar in size, shape and mass but having one-fourth magnetic moment than that of first magnet, oscillating at same place will be
| (a) 0.75 sec | (b) 1.5 sec | (c) 3 sec | (d) 6 sec |
It is not convenient to use a spherical Gaussian surface to find the electric field due to an electric dipole using Gauss’s theorem because
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(a) Gauss’s law fails in this case |
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(b) This problem does not have spherical symmetry |
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(c) Coulomb’s law is more fundamental than Gauss’s law |
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(d) Spherical Gaussian surface will alter the dipole moment |
