One metallic sphere A is given positive charge whereas another identical metallic sphere B of exactly same mass as of A is given equal amount of negative charge. Then
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(a) Mass of A and mass of B still remain equal |
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(b) Mass of A increases |
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(c) Mass of B decreases |
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(d) Mass of B increases |
(d) Mass of B increases
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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 |
Einstein's photoelectric equation states that 
. In this equation 
refers to
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(a) Kinetic energy of all the emitted electrons |
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(b) Mean kinetic energy of the emitted electrons |
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(c) Maximum kinetic energy of the emitted electrons |
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(d) Minimum kinetic energy of the emitted electrons |
What is the effective capacitance between points X and Y
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(a) 24 μF |
(b) 18 μF |
(c) 12 μF |
(d) 6 μF |
A negatively charged plate has charge density of 2 
. The initial distance of an electron which is moving toward plate, cannot strike the plate, if it is having energy of 200 eV
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(a) 1.77 mm |
(b) 3.51 mm |
(c) 1.77 cm |
(d) 3.51 cm |
Compton effect is associated with
| (a) α - rays | (b) β - rays | (c) X-rays | (d) Positive rays |
An air filled parallel plate capacitor has capacity C. If distance between plates is doubled and it is immersed in a liquid then capacity becomes twice. Dielectric constant of the liquid is
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(a) 1 |
(b) 2 |
(c) 3 |
(d) 4 |