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The unit of e.m.f is...

The unit of e.m.f is

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What is the unit of e.m.f?

The radius of a coil s changing at the rate of 10^-2 units in a normal magnetic field of 10^-3 units and the induced e.m.f. is 1muV . Find the final radius of the coil.

The induced e.m.f. is sometimes called back e.m.f. Why ?

The induced e.m.f in a circuit

Two cells of e.m.f. 10V & 15V are connected in parallel to each other between points A&B. The cell of e.m.f. 10V is ideal but the cell of e.m.f. 15V has internal resistance 1Omega . The equivalent e.m.f. between A and B is:

Two cells of e.m.f. 10V & 15V are connected in parallel to each other between points A&B. The cell of e.m.f. 10V is ideal but the cell of e.m.f. 15V has internal resistance 1Omega . The equivalent e.m.f. between A and B is:

The direction of the induced e.m.f. is determined by

For a coil of unit area, induction is doubled in 0.2s . Then, the induced e.m.f. is