Questions
A magnet of length 0.1 m and pole strength 50 Am is kept in a magnetic field T at an angle to it. The couple acting on it is
detailed solution
Correct option is A
M=50×0.1 = 5B = 4×10−5Tτ = MBSinθ = 4×10−5×5×12=10×10−5 = 10−4N−mTalk to our academic expert!
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The magnetic needle of a tangent galvanometer is deflected at an angle .The horizontal component of earth's magnetic field is along the plane of the coil. The magnetic induction produced by the coil at its center is
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