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Assertion : Magnetic field interacts wit...

Assertion : Magnetic field interacts with a moving charge and not with a stationary charge.
Reason : A moving charge produces a magnetic field.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is NOT the correct explanation of A

C

A is true but R is false

D

A is false and R is true

Text Solution

Verified by Experts

The correct Answer is:
A
Current carrying wire creates magnetic field. This magnetic field has no effect on a stationary charge. But when the charge also moves, it creates a current. This current produces a magnetic field. Two fields interact and the charge is deflected. So, the assertions true. Moving charge creates a current which produces a magnetic field. So, the reason is also true Reason is the correct explanation of A.
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Knowledge Check

  • The work done by a magnetic field on moving charge is

    A
    zero because `vecF` acts parallel to `vecv.`
    B
    positive because `vecF` acts perpendicular to `vecv`.
    C
    zero because `vecF` acts perpendicular to `vecv`.
    D
    negative because `vecF` acts parallel to `vecv`.

  • Assertion : Magnetic field do not work on moving charge Reason : Magnetic field do not provide acceleration to charge.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • A: The magnetic field always accelerates a moving charge if the moving charge cuts the field lines. R: When a moving charge cuts the magnetic field lines, the magnetic force on the charge is always non zero.

    A
    If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
    B
    If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark 2.
    C
    If assertion is true statement but Reason is false, then mark (3)
    D
    If both Assertion and Reason are false statements, then mark (4)

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