8. Fig. 21 shows two circular wires A and B that are placed on top of each other. The lower wire loop B carries a steady current. A B Figure 21 (a) With the wires in position as in figure 21 the current in B is switched off. Is there a induced current in loop A? What is its direction? (b) The current in loop B is switched back on. After a few minutes, the wire loop A is pulled up and away from B. What is the direction of the induced current in the loop A? Will there be a force of attraction or repulsion between the two loops? Explain.
8. Fig. 21 shows two circular wires A and B that are placed on top of each other. The lower wire loop B carries a steady current. A B Figure 21 (a) With the wires in position as in figure 21 the current in B is switched off. Is there a induced current in loop A? What is its direction? (b) The current in loop B is switched back on. After a few minutes, the wire loop A is pulled up and away from B. What is the direction of the induced current in the loop A? Will there be a force of attraction or repulsion between the two loops? Explain.
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Transcribed Image Text:8. Fig. 21 shows two circular wires A and B that are placed on top of each other. The lower wire loop B
carries a steady current.
06
Figure 21
(a) With the wires in position as in figure 21 the current in B is switched off. Is there a induced current
in loop A? What is its direction?
(b) The current in loop B is switched back on. After a few minutes, the wire loop A is pulled up and
away from B. What is the direction of the induced current in the loop A? Will there be a force of
attraction or repulsion between the two loops? Explain.
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