Electrical Engineering Multiple Choice – Electromagnetic Induction MCQs Part 4
Contents
- 1 A crack in the magnetic path of an inductor will likely cause
- 2 The resistance and inductance of an open coil are
- 3 If all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be
- 4 Laminated iron core has reduced eddy-current losses since
- 5 Lenz’s law is a consequence of the law of conservation of
A crack in the magnetic path of an inductor will likely cause
A crack in the magnetic path of an inductor will likely cause
- Increased inductance
- Reduced inductance
- Unchanged inductance
- Zero inductance
Correct answer: 2. Reduced inductance
The resistance and inductance of an open coil are
The resistance and inductance of an open coil are
- Infinite resistance and normal inductance respectively
- Infinite resistance and zero inductance respectively
- Zero resistance and high inductance respectively
- Zero resistance and inductance respectively
Correct answer: 2. Infinite resistance and zero inductance respectively
If all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be
If all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be
- 0
- 0.5
- 1
- 2
Correct answer: 3. 1
Laminated iron core has reduced eddy-current losses since
Laminated iron core has reduced eddy-current losses since
- More wire can be used with less DC resistance in coil
- The laminations are insulated from each other
- The laminations are stacked vertically
- The magnetic flux is concentrated in the air gap of the core
Correct answer: 2. The laminations are insulated from each other
Lenz’s law is a consequence of the law of conservation of
Lenz’s law is a consequence of the law of conservation of
- Charge
- Energy
- Induced current
- Induced EMF
Correct answer: 2. Energy