Electro Magnetic Induction And Alternating Currents Question 101
Question: A bulb is connected first with dc and then ac of same voltage then it will shine brightly with [RPET 2000]
Options:
A) AC
B) DC
C) Brightness will be in ratio 1/1.4
D) Equally with both
Show Answer
Answer:
Correct Answer: D
Solution:
Brightness µ $ P_{consumed}\propto \frac{1}{R} $ for Bulb, $ R_{ac}=R_{dc}, $ so brightness will be equal in both the cases.
BETA
