Ohm's Law: Calculate the Applied Voltage
What is the voltage that must be applied in a circuit where a current of 9 A flows through a device with a resistance of 43 ohms?
A. 387 V
B. 4.8 A
C. 387 A
D. 4.8 V
Answer:
The correct answer is A. 387 V. Make sure not to mistakenly choose 387 A as the answer.
Ohm's law is a fundamental principle in electronics that relates voltage, current, and resistance in an electrical circuit. It states that the voltage across a device is equal to the product of the current flowing through it and its resistance.
In this particular case, where a current of 9 A is flowing through a device with a resistance of 43 ohms, we can use Ohm's law to calculate the applied voltage:
Voltage = Current x Resistance
Voltage = 9 A x 43 ohms
Voltage = 387 V
Therefore, the correct voltage that must be applied in this circuit is 387 volts. It is essential to understand and apply Ohm's law correctly to solve electrical problems accurately.