If the total impedance in an AC circuit is 20Ω and the current is 2A, what is th

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Question: If the total impedance in an AC circuit is 20Ω and the current is 2A, what is the voltage across the circuit? (2023)

Options:

Correct Answer: 20V

Exam Year: 2023

Solution:

Using Ohm\'s law, V = IZ = 2A * 20Ω = 40V.

If the total impedance in an AC circuit is 20Ω and the current is 2A, what is the voltage across the circuit? (2023)

If the total impedance in an AC circuit is 20Ω and the current is 2A, what is the voltage across the circuit? (2023)

Step 1: Identify the values given in the problem. The total impedance (Z) is 20Ω and the current (I) is 2A.
Step 2: Recall Ohm's law, which states that Voltage (V) equals Current (I) multiplied by Impedance (Z). The formula is V = I * Z.
Step 3: Substitute the values into the formula. Replace I with 2A and Z with 20Ω: V = 2A * 20Ω.
Step 4: Calculate the voltage. Multiply 2 by 20 to get 40. So, V = 40V.
Step 5: Conclude that the voltage across the circuit is 40V.

Ohm's Law – Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it and the resistance (Z) of the conductor, expressed as V = IZ.