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In case of electromagnetic induction in ...

In case of electromagnetic induction in a conductor

A

electromotive force is induced whenever the conductor starts moving in a magnetic field

B

induced electromotive force is proportional to the magnetic flux linked with the conductor

C

induced current may be zero even if the induced emf is not zero

D

induced emf does not depend on the resistance of the conductor

Text Solution

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The correct Answer is:
C, D
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Knowledge Check

  • Statement I: Induced emf in a conductor is proportional to the time rate of change of associated magnetic flux. Statement II: In case of electromagnetic induction transfer of energy takes place in a manner so that total energy is conserved.

    A
    Statement I is true, statement II is true, statement II is a correct explanation for statement I
    B
    Statement I true, statement II is true, statement II is not a correct explanation for statement I
    C
    Statement I is true, statement II is false
    D
    Statement I is false, statement II is true

  • The unit of magnetic induction

    A
    oersted
    B
    Henry
    C
    Gauses
    D
    weber

  • If the current through a solenoid changes with time electromagnetic induction takes place in the solenoid. This is known as self-induction. In general, for a current I, the induced emf in the coil is e=-L(dI)/(dt) . L is the self-inductance of the solenoid. On the other hand, such change in the current in a solenoid can produce electromagnetic induction in another adjacent solenoid. The induced emf in the other solenoid e=-M(dI)/(dt) , M is called the mutual inductance of the solenoids. If L_(1) and L_(2) are the self-inductance of the adjacent coils then their mutual inductance M=ksqrt(L_(1)L_(2)) . If the magnetic flux produced by the current in one coil is totally linked with the other coil then k = 1. Self-inductance (in H) of the coil in question (III) is

    A
    0.1
    B
    0.08
    C
    0.01
    D
    0.008

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    If the current through a solenoid changes with time electromagnetic induction takes place in the solenoid. This is known as self-induction. In general, for a current I, the induced emf in the coil is e=-L(dI)/(dt) . L is the self-inductance of the solenoid. On the other hand, such change in the current in a solenoid can produce electromagnetic induction in another adjacent solenoid. The induced emf in the other solenoid e=-M(dI)/(dt) , M is called the mutual inductance of the solenoids. If L_(1) and L_(2) are the self-inductance of the adjacent coils then their mutual inductance M=ksqrt(L_(1)L_(2)) . If the magnetic flux produced by the current in one coil is totally linked with the other coil then k = 1.

    If the current through a solenoid changes with time electromagnetic induction takes place in the solenoid. This is known as self-induction. In general, for a current I, the induced emf in the coil is e=-L(dI)/(dt) . L is the self-inductance of the solenoid. On the other hand, such change in the current in a solenoid can produce electromagnetic induction in another adjacent solenoid. The induced emf in the other solenoid e=-M(dI)/(dt) , M is called the mutual inductance of the solenoids. If L_(1) and L_(2) are the self-inductance of the adjacent coils then their mutual inductance M=ksqrt(L_(1)L_(2)) . If the magnetic flux produced by the current in one coil is totally linked with the other coil then k = 1. The self-inductance (in H) of a coil when the induced emf is 50muV for a change of 1 mA. s^(-1) in current through it, is

    If the current through a solenoid changes with time electromagnetic induction takes place in the solenoid. This is known as self-induction. In general, for a current I, the induced emf in the coil is e=-L(dI)/(dt) . L is the self-inductance of the solenoid. On the other hand, such change in the current in a solenoid can produce electromagnetic induction in another adjacent solenoid. The induced emf in the other solenoid e=-M(dI)/(dt) , M is called the mutual inductance of the solenoids. If L_(1) and L_(2) are the self-inductance of the adjacent coils then their mutual inductance M=ksqrt(L_(1)L_(2)) . If the magnetic flux produced by the current in one coil is totally linked with the other coil then k = 1. If the induced emf in a coil totally linked with the coil in question (II) be 20muV , the mutual inductance (in H) of the two coils is

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