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CBSE - XII Science - Physics - Electromagnetic Induction

A metallic rod of length l is rotated at a constant angular speed ω, normal to a uniform magnetic field B. Derive an expression for the current induced in the rod, if the resistance of the rod is R.

Asked by Topperlearning User 7th July 2015, 2:33 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

Magnetic flux in a coil changes from 13 × 10-3 Wb to 5 × 10-3 Wb in 0.02 sec. Find the induced emf.

Asked by Topperlearning User 7th July 2015, 10:16 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

a) What will be the direction of the induced current in the following setup? In figure b) a steady current flows through the wire find the direction of induced emf?

Asked by Topperlearning User 7th July 2015, 10:12 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

The expression for magnetic flux is given by Calculate the emf induced at t = 3 s.

Asked by Topperlearning User 7th July 2015, 10:11 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Induced emf results into induced current, which laws help in finding the direction of this current?

Asked by Topperlearning User 7th July 2015, 10:10 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Calculate the emf induced in a wire of 2 m moving with a speed of 15 m/s perpendicular to a magnetic field of 2 Wb /m2.

Asked by Topperlearning User 7th July 2015, 10:09 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What are the conditions under which no emf will be induced in the circuit?

Asked by Topperlearning User 7th July 2015, 10:07 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

The figure shows the variation of field strength versus time of a loop kept in a magnetic field From the graph answer the following questions: a) Would there be any induced voltage if yes state when? b) During BC, CD and DE will there be flow of current?

Asked by Topperlearning User 7th July 2015, 9:58 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What is induced emf ?

Asked by Topperlearning User 7th July 2015, 9:56 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What are Foucault currents?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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