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The electric field inside a conductor...

The electric field inside a conductor

A

must be zero

B

may be nonzero

C

must be non zero

D

Both (a) and (c) are correct

Text Solution

Verified by Experts

The correct Answer is:
B
(b)
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One of your friends argues that he has read in previous chapters that there can be no electric field inside a conductor. And hence there can be no current through it.What is the fallacy in this argument?

A cylindrical conductor has length l and area of cross section A. Its conductivity changes with distance (x) from one of its ends as sigma = sigma_(0) (l)/(x). [sigma_(0) "is a constant"] . Calculate electric field inside the conductor as a function of x , when a cell of emf V is connected across the ends.

Knowledge Check

  • When electric field inside a conductor is E, mobility of free electrons inside the conductor is mu . When the electric field is doubled mobility will be

    A
    `mu`
    B
    `2mu`
    C
    `( mu )/(2)`
    D
    ` ( mu )/( 4)`

  • STATEMENT-2 : An isolated neutral conductor is given some charge . As it is being charged, an electric field appears in the conductor. and STATEMENT -2 : Under static conditions, the net electric field inside a conductor is zero.

    A
    Statement-1 is True, Statement-2 is True, Statement -2 is a correct explanation for Statement-1
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
    C
    Statement-1 is True, Statement -2 is False
    D
    Statement-1 is False, Statement-2 is True.

  • The ratio of magnitude of current density and magnitude of electric field inside the conductor is

    A
    Independent of temperature
    B
    Independent of dimension of conductor
    C
    Independent of material of conductor
    D
    All of these

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    A charge q kept in front of a neutal metallic sphere. Find the electric field at the centre of sphere due to the induced charges on the surface of the sphere shown. The net electric field inside the conductor is zero. This is produced by induced charged and the external charge.

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