Calculate the Applied Voltage in an Electric Device

Understanding Ohm's Law

Ohm's Law is a fundamental principle in the field of electronics that explains the relationship between voltage, current, and resistance in an electric circuit. According to Ohm's Law, the voltage (V) across a device is equal to the product of the current (I) flowing through the device and the resistance (R) of the device, or V = IR.

Given Data

In this particular scenario, a current of 9 A flows through an electric device with a resistance of 43 Ω. The question is: What must be the applied voltage in this specific circuit?

Potential Answers

The possible answers to this question are:
  • A. 4.8 V
  • B. 387 V
  • C. 4.8 A
  • D. 387 A
What must be the applied voltage in this particular circuit?

Answer:

B. 387 V

Explanation:

Ohm's law states that the voltage is the product of the current and resistance.

V = IR

V = (9 A) (43 Ω)

V = 387 V

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