There is a frill of 20 bulbe (connected in series ) in a room. One bulb is fused. The remaining 19 bulbs are again joined in series and connected to the same supply. Will the light increase or decrease in the room ?

Options

A. both assertion and reason are true and the reason is Assertion and Reason explanation of the Assertion
B. both assertion and reason are true and the reason is Assertion and the correct explanation of the Assertion
C. Assertion is true , but the reason is false
D. both assertion and reason are false

Answer

d

Explanation

The resistance of `20` bulb in series is more than that of `19` bulb, The current in a frill of `20` bulb will be less than that of `19` bulb , since power `prop ("current")^(2)`, so the bulb in the frill of `19` bulb will glow with more brightness than that of `20` bulb frill. Thus both Asseration and Reason are false.