The potential difference between point A & B is
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(a) |
(b) |
(c) |
(d) 0 |
The potential difference between point A & B is
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(a) |
(b) |
(c) |
(d) 0 |
(d) 0
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Assertion : A compass needle when placed on the magnetic north pole of the earth rotates in vertical direction.
Reason : The earth has only horizontal component of its magnetic field at the north poles.
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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. |
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Resistance of a voltameter is 2Ω, it is connected in series to a battery of 10 V through a resistance of 3Ω. In a certain time mass deposited on cathode is 1 gm. Now the voltameter and the 3Ω resistance are connected in parallel with the battery. Increase in the deposited mass on cathode in the same time will be
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(a) 0 |
(b) 1.5 gm |
(c) 2.5 gm |
(d) 2 gm |
If the amplification factor of a triode (m) is 22 and its plate resistance is 6600 ohm, then the mutual conductance of this valve is mho is
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(a) |
(b) 25 |
(c) |
(d) |