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Magnetic Field Due to a Straight Current Carrying Conductor

BAsic cause o...

Question

BAsic cause of induced emf:Is it just change in magnetic flux around a current carrying conductor or rate of change of magnetic flux?

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Solution

It is only because of change in magnetic flux.

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Q. ________ states current is induced in a conductor if the magnetic flux linked with the conductor changes.

Q. Assertion (A): Whenever the magnetic flux linked with a closed coil changes there will be an induced emf as well as an induced current.
Reason (R): According to Faraday, the induced emf is inversely proportional to the rate of change of magnetic flux linked with a coil.

Q. The expression for the induced emf generated in a coil as a result of change in magnetic flux linked with it

Q. (a) Describe a simple experiment (or activity) to show that the polarity of emf induced in a coil is always such that it tends to produce a current which opposes the change of magnetic flux that produces it.
(b) The current flowing through an inductor of self inductance

L

is continuously increasing. Plot a graph showing the variation of
(i) Magnetic flux versus the current
(ii) Induced emf versus

d l / d t

(iii) Magnetic potential energy stored versus the current.

Q. In a coil resistance

100 Ω

, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is :

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