Question

PLEASE ACTUALLY DO IT OUT! I TRIED TO DO THE BOTTOM ANSWERS AND KEPT GETTING WRONG FOR LAST TWO.

The heating coils in a hair dryer are 0.800 cm in diameter, have a combined length of 1.00 m, and a total of 375 turns.

(a) What is their total self-inductance assuming they act like a single solenoid?
H
(b) How much energy is stored in them when 11.5 A flows?
J
(c) What average emf opposes shutting them off if this is done in 4.17 ms (one-fourth of a cycle for 60 Hz AC)?
mV

Answer 1

Here is what I solved before, please modify the figures as per your question. Please let me know if you have further questions. If this helps then kindly rate 5-stars

The heating coils in a hair dryer are 0.800 cm in diameter, have a combined length of 1.00 m, and a total of 385 turns.

(a) What is their total self-inductance assuming they act like a single solenoid?

H
(b) How much energy is stored in them when 10.5 A flows?
J
(c) What average emf opposes shutting them off if this is done in 4.17 ms (one-fourth of a cycle for 60 Hz AC)?

solution