Question

ANSWER ALL OF THEM NOT PICKING

a. You have a 10 volt parallel circuit, with 2 resistors on it. What is the voltage across the first resistor? Across the second?


b. You have the same two resistors on a 10 volt series circuit. Will the voltage going into the second resistor be more, less, or the same as that going into the first resistor? Exact numbers aren’t needed!


c. You have a series circuit with a current of 6 amps and three resistors on it, with resistances of 10 ohms, 5 ohms, and 6 ohms, respectively. What is the voltage of this circuit? Show your calculation.

Answer 1

a. In a parallel circuit, the voltage across every resistor is the same. So, the voltages across the first resistor and second are both 10 volts.

b. The same. In a series circuit, the voltage is split between the resistors. Since the resistors have the same resistance, the voltage across both of them will be the same.

c. V = IR (Ohm’s law)

I = 6 amps
R = 10 + 5 + 6 = 21 ohms (because in a series circuit, the total resistance is just the sum of all of the resistors’ resistances)

V = (6)(21) = 126 volts