Question: In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the apparent power? (2022)
Options:
120 W
1200 W
1000 VA
100 VA
Correct Answer: 1000 VA
Exam Year: 2022
Solution:
Apparent power S = V * I = 120 V * 10 A = 1200 VA.
In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the a
Practice Questions
Q1
In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the apparent power? (2022)
120 W
1200 W
1000 VA
100 VA
Questions & Step-by-Step Solutions
In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the apparent power? (2022)
Step 1: Identify the voltage in the circuit. In this case, the voltage (V) is 120 volts.
Step 2: Identify the current in the circuit. Here, the current (I) is 10 amperes.
Step 3: Use the formula for apparent power, which is S = V * I.
Step 4: Substitute the values into the formula: S = 120 V * 10 A.
Step 5: Calculate the result: 120 V * 10 A = 1200 VA.
Step 6: Conclude that the apparent power is 1200 volt-amperes (VA).
Apparent Power – Apparent power (S) in an AC circuit is calculated as the product of the root mean square (RMS) voltage (V) and the RMS current (I), measured in volt-amperes (VA).
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