Let's Solve This Electric Puzzle!

What must be the applied voltage in this particular circuit?

A. 387 V

B. 4.8 V

C. 387 A

D. 4.8 A

Answer: Option (A) is the correct answer.

Ohm's law states that current passing through a circuit is directly proportional to the voltage over resistance.

Mathematically, I = V / R

where, I = current, V = voltage, R = resistance

It is given that the electric device has a current of 9 A and a resistance of 43 ohms. Therefore, we can calculate the voltage as follows:

I = V / R or V = I x R

V = 9 Ampere x 43 Volts/Ampere = 387 V

Thus, we can conclude that the applied voltage in this particular circuit is 387 V.