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Assertion : The tyres of aircraft's are slightly conducting.
Reason : If a conductor is connected to ground, the extra charge induced on conductor will flow to ground.
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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. |
The inductance of a closed-packed coil of 400 turns is 8 mH. A current of 5 mA is passed through it. The magnetic flux through each turn of the coil is
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(a) |
(b) |
(c) |
(d) |
In Milikan’s experiment, an oil drop having charge q gets stationary on applying a potential difference V in between two plates separated by a distance ‘d’. The weight of the drop is
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(a) qVd |
(b) q |
(c) |
(d) q |
Two long parallel wires are at a distance 2d apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field B along the line XX’ is given by
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(a)
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(b)
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(c)
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(d)
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The slope of plate characteristic of a vacuum diode is 2 
The plate resistance of diode will be
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(a) 50 W |
(b) 50 kW |
(c) 500 kW |
(d) 500 kW |
