In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?
Correct answer: B. be doubled
- A. be reduced by half
- B. be doubled
- C. be four times as high
- D. be reduced to one fourth
Explanation
For a pure inductor, Xₗ = 2πfL and I = V/Xₗ, so current is inversely proportional to frequency. Halving the frequency halves the reactance and doubles the current.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Circuit Analysis
394 free Circuit Analysis MCQs from Electrical Engineering, 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 Electrical Engineering questions like this
Electrical Engineering is on 2 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 Circuit Analysis questions
The power factor of a D.C. circuit is always__________?
Ohm is unit of all of the following except___________?
The frequency of an alternating current is____________?
In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will__________?
An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms?
The product of apparent power and cosine of the phase angle between circuit voltage and current is