Question

4. How does the self-inductance of an air core coil
change, when (i) the number of turns in the coil
is decreased, (ii) an iron rod is introduced in the
coil ?
A copper coil L wound on a soft iron core and a
lamp B are connected to a battery & through a
tapping key K. When the key is closed, the
lamp glows dimly. But when the key is
suddenly opened, the lamp flashes for an
instant to much greater brightness. Explain.
(CBSE OD 03, 04 ,05, 09 ,12 ,13 ,15 ,17 ; CBSE F 05 ,14]​

Answer 1

Answer:

limit your questions and limit your words sir