Question

A circuit with a 70 V battery, a 55 Ω resistor, a resistor with 0.2 A across it, and another 55 Ω resistor in series. What is the resistance of the unknown resistor?

Answer 1

350 Ω

Step-by-step explanation:

The resistance of the unknown resistor can be found by using Ohm's Law, which states that the voltage (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R). We know the voltage (70 V) and the current (0.2 A) for the circuit, so we can find the resistance of the unknown resistor as follows:

V = IR

70 V = 0.2 A * R

R = 70 V / 0.2 A

R = 350 Ω

So the resistance of the unknown resistor is 350 Ω.