CBSE Class 12-science Physics Motional emf
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- What is induced emf ?
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?
- What are the conditions under which no emf will be induced in the circuit?
- 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.
- Induced emf results into induced current, which laws help in finding the direction of this current?
- The expression for magnetic flux is given by
Calculate the emf induced at t = 3 s.
- 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?
- Magnetic flux in a coil changes from 13 × 10-3 Wb to 5 × 10-3 Wb in 0.02 sec. Find the induced emf.
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