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  4. As a result of change in the magnetic flux linked to the closed loop shown in figure, an emf, V volt is induced in the loop. The work done (in joule) in taking a charge q coulomb once along the loop is <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/42e98ce424d7c6e00bd19b8e89d22fda-.jpeg />

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Q. As a result of change in the magnetic flux linked to the closed loop shown in figure, an emf, $V$ volt is induced in the loop. The work done (in joule) in taking a charge $q$ coulomb once along the loop is
image

Electromagnetic Induction

Solution:

Work done in taking a charge $= Q$
Volt induced in the loop $= V$
Work done in moving a test charge $Q$ and a loop having induced emf $E$,
will be QE $\therefore $ As the induced electric field due to change in magnetic field is non-conservative.
The work done due to change will become $W = QV$
Hence, The work done (in joule) in taking a charge $Q$ column once along the loop is $QV$