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A precision laboratory resistor is made of a coil of wire 1.60 cm in diameter and...

A precision laboratory resistor is made of a coil of wire 1.60 cm in diameter and 4.00 cm long, and it has 540 turns.

(a) What is its self-inductance (in mH)? ______mH

(b) What average emf (in V) is induced if the 11.0 A current through it is turned on in 5.00 ms (one-fourth of a cycle for 50 Hz AC)? ____V

(c) What is its inductance (in mH) if it is shortened to half its length and counter-wound (two layers of 270 turns in opposite directions)? ____mH

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