Three capacitors each of capacitance 1μF are connected in parallel. To this combination, a fourth capacitor of capacitance 1μF is connected in series. The resultant capacitance of the system is
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(a) 4μF |
(b) 2μF |
(c) |
(d) |
(d) 
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The curves (a), (b) (c) and (d) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light (I1 > I2). In which figure is the correct variation shown
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(a)
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(b)
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(c)
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(d)
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Assertion : An artificial satellite with a metal surface is moving above the earth in a circular orbit. A current will be induced in satellite if the plane of the orbit is inclined to the plane of the equator.
Reason : The current will be induced only when the speed of satellite is more than 8 km/sec.
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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 equivalent resistance of the circuit shown in the figure is
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(a) 8 W |
(b) 6 W |
(c) 5 W |
(d) 4 W |
If the separation between slits in Young’s double slit experiment is reduced to 
the fringe width becomes n times. The value of n is
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(a) 3 |
(b) |
(c) 9 |
(d) |
