The phase angle between the voltage and current in A.C through a pure inductor is:
Correct answer: B. 90°
- A. 0°
- B. 90°
- C. 60°
- D. 180°
Explanation
The correct answer is 90°. In a purely inductive AC circuit, the current lags the voltage by 90 degrees. This is because inductors resist changes in current, creating a phase difference where the peak current occurs after the peak voltage. Option A (0°) would be correct for a purely resistive circuit, where voltage and current are in phase. Option C (60°) might occur in more complex circuits that have both resistive and inductive components. Option D (180°) describes a purely capacitive circuit, where current leads voltage by 180 degrees.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
Practise Alternating Current
592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Alternating Current questions
The resonance frequency of an LCR circuit is:
An A.C varies with time (t) sec as I=4 sin(200πt), the r.m.s value of current in "A" is:
In pure inductance, the average power dissipated is:
Which one of the following is not electromagnetic in nature?
If λv, λx and λm represent the wavelengths of visible light, X-rays and microwaves respectively, then:
An electromagnetic wave is propagating along Y-axis. Then: