Current Electricity Charging Discharging Of Capacitors Question 173
Question: In the following circuit, bulb rated as 1.5 V, 0.45 W. If bulbs glows with full intensity then what will be the equivalent resistance between X and Y
Options:
A) 0.45 W
B) 1 W
C) 3 W
D) 5 W
Show Answer
Answer:
Correct Answer: B
Solution:
When bulb glows with full intensity, then voltage across it will be 1.5 V and voltage across 3 W resistance will be 4.5 V. Current through 3 W resistance $ i=\frac{4.5}{3}=1.5A $ Same current will flow between X and Y So $ V _{XY}=iR _{XY} $
Therefore $ 1.5=1.5R _{XY} $
Therefore $ R _{XY}=1\Omega $
BETA
