Inductance of a coil Varies__________?
Correct answer: E. as A. to (d)
- A. directly as the cross-sectional area of magnetic core
- B. directly as square of number of turns
- C. directly as the permeability of the core
- D. inversely as the length of the iron path
- E. as A. to (d)
Explanation
For a coil, L = μN²A/l, so inductance increases with core area, permeability, and the square of turns, while decreasing with magnetic-path length. Therefore all statements from A through D are true.
Last updated
Practise Circuit Analysis
394 free Circuit Analysis MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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.
Related questions
74. Sparking occurs when a load is switched off because the circuit has high_________?
A 12 kΩ resistor, a 15 kΩ resistor, and a 22 kΩ resistor are in series with two 10 kΩ resistors that are in parallel. The source voltage is 75 V. Current through the 15 kΩ resistor is approximately___________?
A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be___________?
A 3 Q resistor having 2 A current will dissipate the power of_______________?
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________