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Consider a current carrying wire (curren...

Consider a current carrying wire (current I) in the shape of a circle. Note that as the current progresses along the wire, the direction of `vecJ` (current density) changes in an exact manner, while the current I remains unaffected. The agent that is essentially responsible for is

A

source of e.mf.

B

electric field produced by charges accumulated on the surface of wire.

C

the charges just behind a given segment of wire which push them just right way by repulsion

D

the charges just behind a given segment of wire which push them just right way by repulsion

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Consider a current carryiing wire (current I) in the shape of a circle

    A
    source of emf
    B
    electric field produced by charges accumulated on the surface of wire
    C
    the charges just behind a given segment of wire which push them just the right way by repulsion
    D
    The charges ahead.

  • Consider a current carrying wire (current I) in the shape of a circle. Note that as the current progresses along the wire, the direction of j (current density) changes in an exact manner, while the current I remain unaffected. The agent that is essentially responsible for is

    A
    source of emf.
    B
    electric field produced by charges accumulated on the surface of wire.
    C
    the charges just behind a given segment of wire which push them just the right way by repulsion.
    D
    the charges ahead.

  • The direction of current in a wire is

    A
    the same as the direction of the flow of electrons through the wire
    B
    opposite to the direction of flow of the electrons through the wire
    C
    the same as the direction of flow of the newtrons through the wire
    D
    opposite to the direction of flow of neutrons through the wire