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PHY 102 Test Compilation PHY 102 1 Objective Question
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Question

Which of the following is true for a.c. circuit?
Options
A All elements in the circuit dissipate power.
B Reactive elements only are associated with apparent power.
C power is dependent on impedance.
Correct Answer
D power factor of purely resistive element is zero.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Power in AC = V_rms I_rms cosφ, and I = V/Z, so power depends on Z. A is false (L,C don't dissipate). B false (apparent power = VI, includes resistive). D false (purely resistive PF=1).

Hint

Power = V²/R for resistive, but generally depends on Z.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 1
Type: Objective
Difficulty: Not specified
Question 195 of 1819
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