There is a solid sphere of radius ‘R’ having uniformly distributed charge. What is the relation between electric field ‘E’ (inside the sphere) and radius of sphere ‘R’ is
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(a) E ∝ |
(b) E ∝ |
(c) E ∝ |
(d) E ∝ |
(c) E ∝ 
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A current carrying loop is free to turn in a uniform magnetic field. The loop will then come into equilibrium when its plane is inclined at
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(a) 0° to the direction of the field |
(b) 45 ° to the direction of the field |
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(c) 90° to the direction of the field |
(d) 135° to the direction of the field |
No current flows between two charged bodies connected together when they have the same
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(a) Capacitance or |
(b) Charge |
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(c) Resistance |
(d) Potential or |
A conducting sphere of radius 10cm is charged 10μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the sphere are separated, then surface density of charges, on the spheres will be in the ratio of
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(a) 1 : 4 |
(b) 1 : 3 |
(c) 2 : 1 |
(d) 1 : 1 |
Assertion : An ac generator is based on the phenomenon of self-induction.
Reason : In single coil, we consider self-induction only.
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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. |
