Finding Resistance: Investigating Series and Parallel Circuits

What is the initial setup used by Catherine to measure the resistance of a fixed resistor?

• Power Pack connected to an ammeter in series

• Power Pack connected to a switch in series

• Power Pack connected to a voltmeter in series

• Power Pack connected to two resistors in parallel

What is the total resistance when two resistors are connected in series?

• 10.3 ohms

• 15.0 ohms

• 20.2 ohms

• 4.975 ohms

How does Catherine verify the series circuit is working before adding the voltmeter?

• By observing the ammeter reading

• By measuring the resistance directly

• By checking the voltmeter reading

• By using a multimeter

What is the total resistance when two resistors are connected in parallel?

• 15.0 ohms

• 10.3 ohms

• 20.2 ohms

• 4.975 ohms

What is the potential difference across the resistors when they are in parallel?

• 0.10 volts

• 1.99 volts

• 0.40 volts

• 2.02 volts

What happens to the total resistance when resistors are added in series?

• It increases

• It becomes zero

• It remains the same

• It decreases

What is the effect of adding resistors in parallel on the total resistance?

• It remains the same

• It doubles

• It increases

• It decreases