Question

13. A coll of insulated wire is connected in
series with a bulb, a battery and a
switch. When the circuit is completed,
the bulb lights up immediately. The
circuit is switched off and a rod of soft
iron is placed inside the coil. On
completing the circuit again, it is
observed that?
a. The bulb is not so bright
There is a slight delay before the bulb
lights up to its normal brightness
C! The bulb is initially bright but gradually
becomes dim
d. The bulb is brighter than before​

Answer 1

Answer:

d

Explanation:

because iron rod placed have some induced current when placed in complete circuit

Answer 2

Answer:

A is the correct answer due to inductance