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Question
A rectangular loop of sides 8 cm and 2 cm with a small break in it is moving out of a region of uniform magnetic field of 0.3 T, directed normal to the loop. At a particular instant, half of the loop is outside the magnetic field and half is inside the magnetic field. What is the emf developed across the break if the velocity of the loop is 1 cms−1 in a direction normal to the longer side of the loop ?
A rectangular loop of sides 8 cm and 2 cm with a small break in it is moving out of a region of uniform magnetic field of 0.3 T, directed normal to the loop. At a particular instant, half of the loop is outside the magnetic field and half is inside the magnetic field. What is the emf developed across the break if the velocity of the loop is 1 cms−1 in a direction normal to the longer side of the loop ?
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Solution
The correct option is D 0.24 mV
B=0.3 T, v=1 cms−1=0.01 ms−1, l=8 cm=0.08m and b=2 cm=0.02m.e=B l v=0.3×0.08×0.01=2.4×10−4 V=0.24 m V
B=0.3 T, v=1 cms−1=0.01 ms−1, l=8 cm=0.08m and b=2 cm=0.02m.e=B l v=0.3×0.08×0.01=2.4×10−4 V=0.24 m V
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