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Magnetic Field - Questions and Answers

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21. The dimension of µr is
A. ML0 T -1
B. LT -1
C. HM -1
D. nil
Explanation:
22. The magnetic axis of a magnet is
A. perpendicular to the length of the magnet
B. along the line joining the poles
C. the direction of zero magnetic flux
D. a line of zero moment
Explanation:
23. The intensity of magnetic field is the force acting on
A. a short bar magnet
B. a long bar magnet
C. a unit north pole
D. a unit south pole
Explanation:
24. One tesla is equivalent to
A. weber
B. weber/metre2
C. amp-metre
D. amp/metre
Explanation:
25. The relationship between magnetic flux and magnetic induction B is
A. φ = B/A
B. B = A/φ
C. B = φ A
D. B = φ/A
Explanation:
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