# Worksheet: Equivalent Resistance of Resistor Combinations

In this worksheet, we will practice calculating the total resistance of combinations of resistors connected in series and parallel to each other.

**Q2: **

In a car, two 30.0 W power headlights and a 2.40 kW power starter are connected in parallel with each other. A 12.0 V emf battery is connected across these components. What power would one headlight and the starter draw from the battery? Neglect any other resistance in the circuit or in the battery and any change in resistances of the devices.

**Q3: **

Consider the circuit shown.

Determine the equivalent resistance of the circuit if switch is open.

Determine the current drawn from the battery if switch is open.

Determine the equivalent resistance of the circuit if switch is closed.

Determine the current drawn from the battery if switch is closed.