NEET Physics Current Electricity Questions Solved


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

(1) 0.45 Ω

(2) 1 Ω

(3) 3 Ω

(4) 5 Ω

(2) 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=4.53=1.5A

Same current will flow between X and Y

So VXY=iRXY1.5=1.5RXYRXY=1Ω

Difficulty Level:

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