Question

In a series combination of electrical appliances, connected to a constant voltage power supply, if we add one more appliance with resistance R in series, then the total electrical power consumed in the circuit will__.

• A. increase
• B. decrease
• C. may increase exponentially
• D. remain same

Answer 1

The correct option is B

decrease

Electric Power is the rate at which energy is dissipated or consumed in an electric circuit. $P=VI=\frac{V^2}{R}$

Power is inversely proportional to resistance. In a series combination, total resistance increases, hence the power decreases.

In series combination of electrical appliances, total electrical power decreases.