A lamp is connected in series with an inductor and an AC source. What happens to the brightness of the lamp when the key is plugged in and an iron rod is inserted inside the inductor?
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hello lamp brightness become dark light
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As iron is inserted, the magnetic field inside of the coil increases. hence, the inductive reactance increases.
Xl = wL
for inductor, I is equal to
current=
or,
from these relation I is inversely proportional to L.
therefore, current decreases as increase in L and hence brightness of bulb decreases.
I Hope It Will Help!
^_^
As iron is inserted, the magnetic field inside of the coil increases. hence, the inductive reactance increases.
Xl = wL
for inductor, I is equal to
current=
or,
from these relation I is inversely proportional to L.
therefore, current decreases as increase in L and hence brightness of bulb decreases.
I Hope It Will Help!
^_^
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