Physics-AC Voltage
NEET Physics AC Voltage MCQ Question
Type: MCQ-conceptual-Easy-Class 12
Which of the following statements about AC voltage in a circuit is correct?
A
In a purely inductive circuit, the power factor cos φ is zero.
B
The power factor increases with the increase of inductive reactance.
C
The average power in an AC circuit is always positive regardless of the phase relationship.
D
Phasors can be used to represent AC voltage and current relationships effectively.
Correct Answer
Option A
Detailed Explanation
In a purely inductive circuit, cos φ is indeed zero, indicating that no power is dissipated despite current flow, making it a wattless current. This aligns with the information provided in the NCERT context regarding AC voltage.
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