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Assertion : When a potential difference ...

Assertion : When a potential difference is applied across a conductor, free electrons start travelling with a constant speed called drift speed.
Reason : Due to potential difference an electric field is produced inside the conductor, which electrons experience a force.

A

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

C

If Assertion is true, but the Reason is false.

D

If Assertion is false but the Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
Electrons get accelerated by the electric. Then, suddenly collision takes place. Then again accelerated and so on.
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Knowledge Check

  • When a potential difference (V) is applied across a conductor, the thermal speed of electrons is

    A
    zero
    B
    proportional to `sqrtT`
    C
    proportional to (T)
    D
    proportional to V

  • When a potential difference is applied across the ends of a linear metallic conductor

    A
    The free electrons are accelerated continuously from the lower potential end to the higher potential end of the conductor
    B
    The free electrons are accelerated continuously from the higher potential end to the lower potential end of the conductor
    C
    The free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor
    D
    The free electrons are set in motion from their position of rest

  • When the potential difference applied across a solid conductor is increased, the rate of flow of electrons

    A
    remains same
    B
    decreases
    C
    increase
    D
    decreases sharply

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    When a potential difference (V) is applied across a conductor at temperature T, the drift velocity of electrons is proportional to

    A potential difference V is applied across a conductor at temperature T. The drift velocity of electrons varies directily as

    When electric field (vec(E)) is applied on the ends of a conductor, the free electrons starts moving in direction

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