An isolated solid metallic sphere is given +Q charge. The charge will be distributed on the sphere
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(a) Uniformly but only on surface |
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(b) Only on surface but non-uniformly |
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(c) Uniformly inside the volume |
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(d) Non-uniformly inside the volume |
(a) Uniformly but only on surface
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A coil carrying electric current is placed in uniform magnetic field, then
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(a) Torque is formed |
(b) E.M.f. is induced |
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(c) Both (a) and (b) are correct |
(d) None of these |
As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is
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(a) 1.51 |
(b) 13.6 |
(c) 40.8 |
(d) 122.4 |
Wave which cannot travel in vacuum is
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(a) X-rays |
(b) Infrasonic |
(c) Ultraviolet |
(d) Radiowaves |
The current in a simple series circuit is 5.0 amp. When an additional resistance of 2.0 ohms is inserted, the current drops to 4.0 amp. The original resistance of the circuit in ohms was
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(a) 1.25 |
(b) 8 |
(c) 10 |
(d) 20 |
Nuclear fission was discovered by
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(a) Auto Hahn and F. strassmann |
(b) Fermi |
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(c) Bethe |
(d) Rutherford |