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A bar magnet is made to fall through a l...

A bar magnet is made to fall through a long vertica! copper tube. The speed (V) of the magnet as a function of time (t) is best represented by

A

a

B

b

C

c

D

d

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-ELECTROMAGNETIC INDUCTION-ASSIGNMENT(SECTION - A) (OBJECTIVE TYPE QUESTIONS)
  1. A short bar magnet passes at a steady speed right through a'long solen...

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  2. A metallic ring with a small cut is held horizontally and a magnet is ...

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  3. A bar magnet is made to fall through a long vertica! copper tube. The ...

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  4. A loop of Irregular shape made of flexible conducting wire carrying cl...

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  5. A loop of irregular shape of conducting wire PORS (as shown in figure)...

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  6. When a conducting wire XY is moved towards the right, a current flows ...

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  7. A copper rod of length l is rotated about one end perpendicular to the...

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  8. A coil of cross-sectional area A having n turns is placed in uniform m...

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  9. A flat coil of 500 turns each of area 50 cm^(2) rotates in a uniform m...

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  10. Eddy current are produce when

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  11. A motor starter

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  12. A simple electric motor has an armature resistance of 1Omega and runs ...

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  13. Which of the following is possible application of an RC circuit?

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  14. The current passing through a choke coil of 5 henry is decreasing at t...

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  15. When the number of turns in a coil is doubled without any change in th...

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  16. A coil of resistance 10 W and an inductance 5H is connected to a 10...

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  17. (a) Obtain the expression for the magnetic energy stored in a solenoid...

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  18. An inductor is connected to a direct voltage source through a switch. ...

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  19. A long solenoid has self inductance. L. If its length is doubled keepi...

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  20. If L and R denote inductance and resistance , respectively , then the ...

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