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Which of the following are uses of elect...

Which of the following are uses of electromagnets?

A

To lift ferromagnetic substances such as iron.

B

In circuit brakers, braking system of train.

C

Used in charged particles accelerators (cyclotrons).

D

All of these.

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The correct Answer is:
D
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TARGET PUBLICATION-MAGNETISM-MCQs
  1. The direction of earth's magnetic field is horizontal and vertical res...

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  2. Soft iron is used for making electromagnet because it

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  3. Which of the following are uses of electromagnets?

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  4. Strength of electromagnet can be increased by

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  5. The magnetic induction due to a bar magnet at a point on its axis is d...

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  6. The magnetic field at a distance d from a short bar magnet in longitud...

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  7. Two points A and B are situated perpendicular to the axis of 4 cm long...

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  8. The magnetic induction due to short magnetic dipole of moment 0.1" A m...

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  9. The magnetic induction due to a bar magnet of length 6 xx 10^(-2)m and...

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  10. Using mass (M), length (L), time (T) and current (A) as fundamental q...

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  11. The magnetic induction at a point on axis or equator is proportional t...

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  12. When a bar magnet is placed in a non-uniform magnetic field, it perfor...

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  13. In order to have a strong electromagnet it must have

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  14. Earth's magnetic field always has a horizontal component except at

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  15. Each pole of magnet of length 20 cm in a magnetic field of induction 0...

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  16. If the moment of a magnet is 0.4 A m^(-1) and force seting on esch pot...

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  17. If at a given place the earth's magnetic inchretion B is 5 xx 10^(-4) ...

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  18. The torque acting on a magnetie dipole of moment 5 A m^(2) when placed...

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  19. The number of electrons flowing in a current carrying circular coil pe...

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  20. The vector sum of magnetic moments of all electrons inside the atom is...

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