Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors

An ideal battery is connected across a resistor of resistance R . If the value of R is decreased, the power dissipated in the resistor will

Options

Adecrease
Bfirst increase and then decrease
Cincrease
Dremain unchanged

Correct answer

C. increase

Step-by-step solution

For an ideal battery, the potential difference V across the resistor remains constant and is equal to the electromotive force of the battery. The power dissipated in the resistor is given by P = V^2 R . Since V is constant, P 1 R . Therefore, when the resistance R is decreased, the power dissipated P will increase.

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