Home
Class 12
PHYSICS
Ametallic block has no potential differe...

Ametallic block has no potential difference applied across it, then mean velocity of free electrons is

A

proportional to T

B

proportional for `sqrt(T)`

C

finite but independent of temperature

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

If the potential difference V applied across a conductor increases to 2V, drift velocity of the electron be

If a constant potential difference is applied across a bulb, the current slightly decreases as time passes and then becomes constant. Explain.

Can the potential difference across a battery be greater than its emf?

Which is the electric potential difference across the plasma membrane of a resting neuron?

The current in a conductor and the potential difference across its ends are measured by an ammeter and a voltmeter.The meters draw negligible current.The ammeter is accurate but the vlotmeter has a zero error(that is ,it does not read zero when no potential difference is applied).Calculate the zero error if the readings for two different conditions are 1.75A, 14.4Vand 2.75a, 22.4V.

A discharge tube contains helium at a low pressure. A large potential difference is applied across the tube. Consider a helium atom that has just been ionized due to the detachment of an atomic electron. Find the ratio of the distance travelled by the free electron to that by the positive ion in a short time dt after the ionization.

Two wire A & B are of the same metal and are of same length have area of cross section in the ratio of 2:1 If the same potential difference is applied across each wire. What will be the ratio of the current flowing through the wires A & B ?

The stopping potential in a photoelectric experiment is linearly related to the inverse of the wavelength (1/lambda) of the light falling on the cathode. The potential difference applied across an X-ray tube is linearly related to the inverse of the cutoff wavelength (1/lambda) of the X-ray emitted. Show that the slopes of the lines in the two cases are equal and find its value.