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The Fig. 6.23 shows two identical rectangular loops (1) and (2), placed on a table along with a straight long current carrying conductor between them. What will be the directions of the induced currents in the loops when they are pulled away from the conductor with same velocity v ? (ii) Will the emf induced in the two loops be equal ? Justify your answer. |
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Answer» Solution :(i) In ACCORDANCE with Lenz.s law induced current flows in an anticlockwise direction in loop number (1), but flows in clockwise direction in loop number (2). Due to current I magnetic field `vecB` developed AROUND loop (1) is perpendicular to the plane of PAPER and pointing outward. On MOVING the loop away the induced emf tends to strengthen the magnetic field and hence induced current flows in anticlockwise direction. Similarly, it can be shown that induced current in loop (2) will flow in clockwise direction. (ii) The magnitude of induced emf in two loops will be different because rate of CHANGE of magnetic flux in them are different. |
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