Question

What happens to the electric current if the number of loops of a wire doubles?
A)it stays the same
B)it doubles
C)it halves
D)it increases exponentially

Answer 1

B

Answer 2

thanks man!

Answer 3

NP

Answer 4

If we are dealing with direct current, the number of loops double, means the wire is twice as long, direct current now sees twice the resistance, it would halve. Assuming AC, then the impedance would change, The inductance would change as the square of the number of turns, since the number of turns has doubled (assuming all other parameters remain the same, then the inductance is 4 times as much. Inductive reactance has now increased 4 times as much (Xl=2PifL) the current will now decrease by 1/4th