Two capacitors of capacitance 2 μF and 3μF are joined in series. Outer plate first capacitor is at 1000 volt and outer plate of second capacitor is earthed (grounded). Now the potential on inner plate of each capacitor will be
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(a) 700 Volt |
(b) 200 Volt |
(c) 600 Volt |
(d) 400 Volt |
(d) 400 Volt
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Electric power is transmitted over long distances through conducting wires at high voltage because
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(a) High voltage travels faster |
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(b) Power loss is large |
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(c) Power loss is less |
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(d) Generator produced electrical energy at a very high voltage |
A light of wavelength 5890 Å falls normally on a thin air film. The minimum thickness of the film such that the film appears dark in reflected light
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(a) 2.945 |
(b) 3.945 |
(c) 4.95 |
(d) 1.945 |
When a thin transparent plate of thickness t and refractive index m is placed in the path of one of the two interfering waves of light, then the path difference changes by
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(a) (m + 1)t |
(b) (m – 1)t |
(c) |
(d) |
The voltage gain of the following amplifier is
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(a) 10 |
(b) 100 |
(c) 1000 |
(d) 9.9 |
Assertion : Fuse wire must have high resistance and low melting point.
Reason : Fuse is used for small current flow 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 the assertion and reason both are false. |
