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# a) Give a counterexample to show that the following statement is false:

a) Give a counterexample to show that the following statement is false: "When the magnetic field through a loop changes, currents run in the loop in such a way as to make a new magnetic field in the opposite direction to the original one."
(b) Two metal rings lie side by side on a table. Current in the left ring runs clockwise and is increasing with time. This induces a current to run in the right ring. Does this induced current run clockwise or counterclockwise? Explain, using a diagram.

a) Give a counterexample to show that the following statement is false:
âWhen the magnetic field through a loop changes, currents run in the
loop in such a way as to make a new magnetic field in the opposite
direction to the original one.â
(b) Two metal rings lie side by side on a table. Current in the left
ring runs clockwise and is increasing with time. This induces a current
to run in the right ring. Does this induced current run clockwise or
counterclockwise? Explain, using a diagram.
AP3
A wire loop is pulled through a region of magnetic fields shown below.
B2
with a constant force F such that the velocity of the loop is constant.
Calculate the speed in terms of the known quantities B1, B2, L, h, R and
F.

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