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solution when electric current equal to 2.5 faraday is passed, the gm equivalent deposited on the cathode is
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(a) 1 |
(b) 1.5 |
(c) 2 |
(d) 2.5 |
(d) 2.5
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The primary winding of transformer has 500 turns whereas its secondary has 5000 turns. The primary is connected to an ac supply of 20 V, 50 Hz. The secondary will have an output of
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(a) 200 V, 50 Hz |
(b) 2 V, 50 Hz |
(c) 200 V, 500 Hz |
(d) 2 V, 5 Hz |
The diagram shows-the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy
| (a) I | (b) II | (c) III | (d) IV |
Assertion : The television broadcasting becomes weaker with increasing distance.
Reason : The power transmitted from TV transmitter varies inversely as the distance of the receiver
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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. |
Assertion : A charged capacitor is disconnected from a battery. Now if its plate are separated farther, the potential energy will fall.
Reason : Energy stored in a capacitor is equal to the work done in charging it.
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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. |