Q28.Two circular
coils P and Q are kept close to each other, of which coil P carries a current.
(a) If coil
P is moved towards Q. will some current be induced in coil Q ? Give reason for your
answer and name the phenomenon involved.
(b)What happens if coil P is moved away from Q? If both the coils are moved in the same direction
with the same speed ? Give reason.
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Answers
Answer:
When coil P is moved towards Q, current will be induced in coil Q. This is because on moving P the magnetic field associated with Q increases and so a current is induced. The Phenomenon is electromagnetic induction.
(ii) If P is moved away from Q, the field associated with Q will decrease and a current will be induced but in the opposite direction
(iii) Current can be induced in a coil by (a) moving a magnet towards or away from the coil (b) moving a coil towards or away from a magnet (c) rotating a coil within a magnetic field.
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Answer:
(i) When coil P is moved towards Q, current will be induced in coil Q. This is because on moving P the magnetic field associated with Q increases and so a current is induced. The Phenomenon is electromagnetic induction.
(ii) If P is moved away from Q, the field associated with Q will decrease and a current will be induced but in the opposite direction
(iii) Current can be induced in a coil by (a) moving a magnet towards or away from the coil (b) moving a coil towards or away from a magnet (c) rotating a coil within a magnetic field.