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Assertion (A): Where magnetic flux chang...

Assertion (A): Where magnetic flux changes, emf is induced. Reason (R): Line integral of induced electric field around the closed loop is non zero.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true but (R) is not the correct explanation of (A)

C

is true but (R) is false.

D

(A) is false and (R) is also false

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Assertion : An emf vec(E) is induced in a closed loop where magnetic flux is varied. The induced vec(E) is not a conservative field. Reason : The line intergral vec(E).vec(dl) around the closed loop is non-zero.

Consider a conducting circular loop placed in a magentic filed as shown. When magnetic field changes with time, magentic flux also changes and emf is induced. e=-(dphi)/(dt) If resistance of loop is R then induced current. i=e/R For Current, charge must have come into motion. Magnetic force cannot make the statinoary charges to move. Actually there is an induced electric field in the conductor caused by changing magnetic flux, which make the change to move intvec(E).dvec(l)=e=-(dphi)/(dt) This induced electric field is non-electrostatic by nature. line integral of vec(E) around a closed path is non-zero A square non- conducting loop 20 cm on a side is placed in a magnetic field The centre of side AB coincides with the centre of magnetic field The magnetic field is increasing at the rate of 2T/s. Find the magnitude of line integral of induced electric field along path BC.

Asseration:Magnetic flux can produce induce e.m.f. Reason:Faraday establishid induced e.m.f. experimentally.

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 ) : Accroding to Faraday, the induced emf is inversely proportional to the rate of change of magnetic flux linked with a coil.

Asseration: Magnetic flux linked to closed surface is zero. Reason: Direction of induced current due to change of magnetic flux is given by faraday's law.

Does chanbe in magnetic flux induce e.m.f. or current ?

The magnetic flux linked with a coil is phi and the emf induced in it is e .

Asseraton: The work done by a charge in a closed (induced) current carrying loop is non-zero. Reason: Induced electric field is non-conservative in nature.

EDUCART PUBLICATION- SAMPLE PAPER SELF-ASSESSMENT (11)-SECTION -B
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