Slightly stuck on one of the parts on two questions. Sorry if it's quite a lengthy post but I feel as if I should write down the whole two questions and the parts with it to make sense. I've also included my answers too and I've mentioned what I need help on.
Question 1. A circuit in a hair dryer consists of a small motor with a voltage of 12 V in series with a heating coil. Both are connected to a 240 V power supply. Current flowing through the motor is 0.6 A.
a) calculate the resistance of the motor.
b) What is the current in the heating coil? and calculate its resistance.
My answers:
a) I got 20 Ω
b) The current through the heating coil is 0.6 A (the same as the current going through the motor) because in series current flowing through one component is the same as the current going through the next component (correct me if I'm wrong).
For the resistance I got 380 Ω but I don't think that's right for some reason... I hope someone can verify this for me.
Question 2: The resistance of a heating element in 450 000 Ω and it's connected to a main supply of 240 V.
a) what's the current flowing through it?
b) how many coulombs of charge pass through the heating element in 1 minute?
c) how much energy is transferred to each coulomb of charge?
d) how much heat energy is produced by the coil in 1 minute?
My answers:
a) I got 0.000533 A
b) I'm not sure if this is right but I got 0.032 C
c) I'm not sure this is right either but I got 7.68 J.
d) I'm stuck on this and I have no idea what to do :/