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Electric field induced by changing magne...

Electric field induced by changing magnetic fields are

A

Conservative

B

Non-conservative

C

May be conservatie or non-conservative depending on the condition

D

Nothing can be said

Text Solution

Verified by Experts

The correct Answer is:
B
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Induced electric field due to changing magnetic field

Consider the following statements: (a)An emf can be induced by moving a conductor in a magnetic field. (b)An emf can be induced by changing the magnetic field.

Read the following two statements. (A) Emf can be induced by changing magnetic field. (B) Emf must be induced when a conductor is moved inside magnetic field.

Statement-1 : A changing electric field produces a magnetic field Statement-2: A changing magnetic field produces an electric field.

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.

AAKASH INSTITUTE-ELECTROMAGNETIC INDUCTION-Assignment (SECTION - A)
  1. The equivalent quantity of mass in electricity is

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  2. Dimensional formula of self-inductance is

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  3. A time varying magnetic flux passing through a coil is given by phi=xt...

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  4. A metalic ring is dropped down, keeping its plane perpendicular to a c...

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  5. Lights of a car become dim when the starter is opereterd. Why?

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  6. Coefficient of coupling between two coils of self-inductances L(1) and...

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  7. There is a uniform magnetic field directed perpendicular and into the ...

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  8. A square loop of wire with side length 10 cm is placed at angle of 45^...

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  9. A uniformly wound solenoid coil of self inductance 1.8xx10^(-4)H and r...

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  10. The magnitude opf the earth's magnetic field at a place is B(0) and th...

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  11. Two parallel rails of a railway track insulated from each other and wi...

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  12. Answer the following questions : (a) When a low flying aircraft pass...

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  13. Electric field induced by changing magnetic fields are

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  14. A circular loop of radius R, carrying current I, lies in x-y plane wit...

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  15. A helicopter rises vertically upwards with a speed of 100 m//s. If the...

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  16. The energy stored in an inductor of self inductance L carrying current...

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  17. An electric motor runs a D.C. source of e.m.f. 200 V and draws a curre...

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  18. Induction furnace is based on the heating effect of

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  19. Two identical circular loops of metal wire are lying on a table withou...

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  20. A short solenoid of length 4 cm, radius 2 cm and 100 turns is placed i...

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