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If the moment of a magnet is 0.4 A m^(-1...

If the moment of a magnet is `0.4 A m^(-1)` and force seting on esch pote in a uniform magnetic field of induction `3.2 xx 10^(-5)"Wb/m"^(2)" is "5.12 xx 10^(-5)N,` the dstance berween the poles of magnet is

A

25cm

B

16cm

C

12.5cm

D

12cm

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The correct Answer is:
A
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TARGET PUBLICATION-MAGNETISM-MCQs
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  2. Each pole of magnet of length 20 cm in a magnetic field of induction 0...

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

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

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

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

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

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  8. Assertion: Magnetic moment of an atoms is due to both, the orbital mot...

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  9. A small hole is made at the centre of the magnet then its magnetic mom...

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  10. A curve between magnetic moment and temperature of magnet is

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  11. The current carrying loop behaves as magnetic dipole because,

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  12. The number of small magnetic dipoles in a solenoid is proportional to

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  13. A straight wire carring current I is turned into a circular loop. If t...

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  14. The torque on a bar magnet due to the earth's magnetic field is maximu...

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  15. Rate of charges of torque tau with deflection theta is maximum for a m...

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  16. The pole strength of a bar magnet is 48 ampere-metre and the distance ...

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  17. A bar magnet is held perpendicular to a uniform magnetic field. If the...

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  18. If a needle is suspended at different places on earth then needle beco...

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  19. The lines of force of earth's magnetic field will be perpendicular to ...

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  20. A compas needle will show which of the following directions at the ear...

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