EASY
12th CBSE
IMPORTANT
Earn 100
A lamp connected in parallel with a large inductor glows brilliantly before going off when the switch is put off. Why?
Important Questions on Electromagnetic Induction
EASY
12th CBSE
IMPORTANT
The inductance coils are made of copper. Why?
EASY
12th CBSE
IMPORTANT
How does the self-inductance of an air coil change when an iron rod is introduced in the coil?
EASY
12th CBSE
IMPORTANT
The motion of copper plates is damped when it is allowed to oscillate between the two poles of a magnet. If slots are cut in the plate, how will the damping be affected?
EASY
12th CBSE
IMPORTANT
A light metal disc on the top of an electromagnet is thrown up as the current is switched on. Why? Give reason.
EASY
12th CBSE
IMPORTANT
Two similar circular co-axial loops carry equal currents in the same direction. If the loops be brought nearer, what will happen to the currents in them?
EASY
12th CBSE
IMPORTANT
Self-induction is called the inertia of electricity. Why?
EASY
12th CBSE
IMPORTANT
A solenoid with an iron core and a bulb are connected to a d.c. source. How does the brightness of the bulb change when the iron core is removed from the solenoid?
EASY
12th CBSE
IMPORTANT
A plot of magnetic flux versus current is shown in FIg.6.50 for two inductors and . Which of the two has larger value of self-inductance?
