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 405 turns. (a) What is their total self-inductance (in H) assuming they act like a single solenoid? I (b) How much energy (in ]) is stored in them when 11.0 A flows? (c) What average emf (in mV) opposes shutting them off if this is done in 4.17 ms (one-fourth of a cycle for 60 Hz AC)? mv Additional Materials eBook Submit Answer 9. [0/2 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2 23.10.P.074. (a) What is the characteristic time constant (in s) of a 24.0 mH inductor that has a resistance of 3.80 0? X S (b) If it is connected to a 12.0 V battery, what is the current (in A) after 12.5 ms? X