Current Electricity Charging Discharging Of Capacitors Question 173
In the following circuit, a bulb rated at 1.5 V, 0.45 W. If the bulb glows with full intensity, then what will be the equivalent resistance between X and Y
Options:
A) 0.45 W
1 W
3 W
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 Ω resistance will be 4.5 V. Current through 3 Ω 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
