The current through a 10 Ω resistor is 1.2 amps. What is the potential difference across the resistor? CONTINUED IN DESCRIPTION

Question

Part B: If this current occurs over a period of 1.2 x 10-2 seconds, how many coulombs of charge were transferred?

Part C: How many electrons passed through the resistor?

Answer 1

Part A:

Potential difference across resistor = current * resistance = 1.2*10 = 12V

Part B:

Time = 1.2 * 10^-2 s.

Charge q = Current * time.

so charge = 1.2 * 1.2 * 10^-2 = 1.44 * 10^-2 C

Part C:

Charge of an electron = 1.60217662 × 10^-19 coulombs

So number of electrons = Total Charge / Charge of an electron = 1.44 * 10^-2 / 1.60217662 × 10^-19

= 8.9 × 10¹⁶