Answer: Option (A) is the correct answer.
Explanation:
Ohm's law states that current passing through a circuit is directly proportional to the voltage over resistance.
Mathematically, \(I = \frac{V}{R}\)
where, I = current
V = voltage
R = resistance
It is given that electric device has current of 9 A and resistance of 43 ohms. Therefore, calculate the voltage as follows.
\(I = \frac{V}{R}\)
or, \(V = I \times R\)
= \(9 Ampere \times 43 \frac{Volts}{Ampere}\)
= 387 V
Thus, we can conclude that the applied voltage in this particular circuit is 387 V.
