Calculating Applied Voltage in Electric Circuit

A current of 9 A flows through an electric device with a resistance of 43 Ω. What must be the applied voltage in this particular circuit?

A. 4.8 V

B. 4.8 A

C. 387 V

D. 387 A

Answer:
387 volts

Explanation:
Ohm's law is used to relate voltage, current, and resistance.
The formula is as follows: V = I * R where: V is the applied voltage (measured in volts), I is the current flowing (measured in amperes), R is the resistance (measured in ohm).
In the given, we have: current (I) = 9 amperes, resistance (R) = 43 ohm.
Substitute with the givens in the above formula to get the voltage as follows: V = 9 * 43 = 387 volts.
Therefore, the applied voltage in this particular circuit is 387 volts.

The correct answer would be:

C. 387 V