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An inductor is connected to a battery th...

An inductor is connected to a battery through a switch. The emf induced in the inductor is much larger when the switch is opened as compared to the emf induced when the switch is closed. Is this statement true or false?

Text Solution

Verified by Experts

The correct Answer is:
A
When switch is opened current suddenly decreasing from steady state value of zero. When switch is closed., it takes time to increase from 0 to steady state value.
`e=|L(/_\i)/(/_\t)|`
`/_\t` in second case is large. Hence, induced emf less.
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Knowledge Check

  • An inductor is connected to a direct voltage source through a switch. Now

    A
    Very large emf is induced in inductor when switch is closed
    B
    Larger emf is induced when switch is opened
    C
    Large emf is induced whether switch is closed or opened
    D
    No emf is induced whether switch is closed or opened

  • An inductor L is allowed to discharge through capacitor C. The emf induced across the inductance when the capacitor is fully charged is

    A
    maximum
    B
    minimum
    C
    zero
    D
    infinite

  • Current through the battery at the instance when the switch S is closed is

    A
    zero
    B
    2A
    C
    4A
    D
    5A

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