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A magnet moves inside a coil. Which of t...

A magnet moves inside a coil. Which of the following factors can affect the emf induced in the coil?
I. The speed at which the magnet moves
II. The magnetic field of the magnet
III. The number of turns in the coil

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The correct Answer is:
D
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AAKASH INSTITUTE-ELECTROMAGNETIC INDUCTION-Assignment (SECTION - A)
  1. A sphere of radius R is placed near a long straight wire that carries ...

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  2. A coil wire rotates about a horizontal north-south axis with its plane...

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  3. A magnet moves inside a coil. Which of the following factors can affec...

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  4. A rectangular loop of wire is placed perpendicualr to a uniform magnet...

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  5. Which of the following can produce maximum induced emf?

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  6. The induced emf produced when a magnet is inserted into a coil does no...

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  7. A cylindrical bar magnet is kept along the axis of a circular coil. If...

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  8. A circular wire loop of radius r is placed in a region of uniform magn...

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  9. When a non magnetic metallic strip is moved away from between the pole...

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  10. A magnet is allowed to fall towards a metal ring. During the fall Its ...

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  11. A coil having 500 square loops each of side 10 cm is placed normal to ...

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  12. The coefficient of mutual induction between two circuits is equal to t...

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  13. The back emf in a DC motor is maximum when,

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  14. If the radius of a coil is changing at the rate of 10^(-2) unit in a n...

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  15. If a coil of 40 turns and area 4.0 cm^(2) is suddenly remove from a m...

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  16. The core of transformer is laminated so that

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  17. Two coil are placed close to each other. The mutual inductance of the ...

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  18. A magnetic flux of 500 microweber passing through a 200 turn coil is r...

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  19. A coil of area 0.1m^(2) has 500 tums. After placing the coil in a magn...

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  20. Two circular coils have their centres at the same point. The mutual in...

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