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.



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