Question

4. During the experiment on electromagnetic induction what is needed to be done to
(a) Maintain a steady flow of current
(b) Stop the flow of current
(c) Increase the strength of induced current.

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Answer 1

Answer:

(a) keep the magnet at a steady distance

(b) to stop the flow of the current take away the magnet form the current.

(c) to increase the strength keep the magnetic as close as possible to the current.

Answer 2

Answer:

a)An equal and opposite force (to the right) is needed to keep PQ moving at a steady speed. The work done in moving the rod will equal the energy dissipated in the resistor.

b.For the literal question, about two “currents”, this would be a relay. The coil will be a low resistance current coil in series with the “another line”. The coil magnetism will pull the N.C. (normally closed) contacts open “to stop the flow of current in a line”. ... Resistance reduces the current.

c.Strength of induced current increased when strength of magnetic field increases. It will also increase when the number of turns are increased or if the speed of conductor increases.