Question

Calculate the current in a 75 Ω resistor when a potential difference of 115 V is placed across it.

a) 0.61 A
b) 1.53 A
c) 85 A
d) 8.12 A

Answer 1

Using Ohm's law, the current is calculated by dividing the potential difference of 115 V by the resistance of 75 Ω, yielding a current of 1.53 A.

Step-by-step explanation:

To calculate the current in a resistor using Ohm's law, you apply the formula I = V / R, where I is the current in amperes (A), V is the potential difference in volts (V), and R is the resistance in ohms (Ω). In this case, we have a potential difference of 115 V and a resistance of 75 Ω. Plugging in these values, we get I = 115 V / 75 Ω = 1.53 A. Hence, the correct answer is 1.53 A, which is choice b).