Electro Magnetic Induction And Alternating Currents Question 419
Question: A typical light dimmer used to dim the stage lights in a theatre consists of a variable induction for L (where inductance is adjustable between zero and
Options:
A) 0.69 H
B) 0.28 H
C) 0.38 H
D) 0.56 H
Show Answer
Answer:
Correct Answer: B
Solution:
-
For power to be consumed at the rate of
we have
Where
