Question

A horizontal wire, of length 5cm and carrying a current of 2A,
is placed in the middle of a long solenoid at right angles to its
axis. The solenoid has 1000 turns per meter and carries a steady
current I. calculate I if the force on the wire is equal to 10-N.​

Answer 1

Answer:

I = 10^-4 / 4π×10^-5

=10/4π

=0.8 A

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