Copper wire loops are placed in different external magnetic fields, as represent
ID: 2265170 • Letter: C
Question
Copper wire loops are placed in different external magnetic fields, as represented by the magnetic field lines shown. Loops A and B are identical, loop C is identical except for a small cut in it as shown.
The loops are stationary. The magnetic field is not changing with time.
a) For each loop state whether or not there is an induced emf. Justify your answer.
b) For each loop state whether or not there is an induced current. If there is an induced current, clearly indicate the direction of the current.
Sometime later, the loops are moving to the left.
c) For each loop state whether or not there is an induced emf. Justify your answer.
d) For each loop state whether or not there is an induced current. If there is an induced current, clearly indicate the direction of the current induced in the loop.
Copper wire loops are placed in different external magnetic fields, as represented by the magnetic field lines shown. Loops A and B are identical, loop C is identical except for a small cut in it as shown.Explanation / Answer
a) in A,B and C induced emf = 0
because magnetic flux is not changing
b) in A,B and Cas there is no induced emf, there is no induced current
c)
in A no induced emf
in B there is induced emf(flux is decresading)
in C there is induced emf(flux is decreasing)
d)
in A induced current is zero.
in B induced current will be counterclockwise (when we see from right to left)
in C induced current will be counterclockwise (when we see from right to left)
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