Question

In the circuit shown below, the resistances are given (in $\Omega$) and the battery is assumed ideal with emf equal to $3.0 \,V.$ The resistor that dissipates the most power is

• A. $R_{1}$
• B. $R_{2}$
• C. $R_{3}$
• D. $R_{4}$

Answer 1

Answer: (A)

Given circuit is

Above circuit can be reduced to following equivalent circuit

So, power dissipation is maximum in $40\Omega$ resistor marked $A$as current through it is maximum