Understanding Series Circuits with Resistors

What happens to the total resistance when a resistor is added in series?

• It decreases.

• It remains the same.

• It increases.

• It fluctuates.

How is the total current in a series circuit calculated?

• By multiplying total voltage and total resistance.

• By dividing total voltage by total resistance.

• By adding total voltage and total resistance.

• By subtracting total resistance from total voltage.

What is the effect on total current when resistance increases in a series circuit?

• Total current becomes zero.

• Total current decreases.

• Total current increases.

• Total current remains the same.

When the switch is closed, what is the total current through the circuit with two bulbs?

• 2.0 amperes

• 1.0 amperes

• 0.5 amperes

• 1.5 amperes

What is the effect on the total current when the switch is opened and a third bulb is added in series?

• Total current becomes zero.

• Total current remains at 1.5 amperes.

• Total current decreases to 1 ampere.

• Total current increases to 2 amperes.

How does the voltage drop across each bulb change when a third bulb is added in series?

• It becomes zero.

• It decreases.

• It remains the same.

• It increases.

What is the voltage drop across each bulb when three identical bulbs are in series with a 9V source?

• 3 volts

• 4.5 volts

• 1.5 volts

• 9 volts

What happens to the brightness of bulbs when a resistor is added in series?

• Brightness increases.

• Brightness decreases.

• Brightness remains the same.

• Brightness fluctuates.

How is the power output of a bulb related to its brightness?

• Power output is inversely proportional to brightness.

• Power output is directly proportional to brightness.

• Power output has no relation to brightness.

• Power output is equal to brightness.

What is the power output of each bulb when three bulbs are in series with a total current of 1 ampere?

• 1 watt

• 2 watts

• 3 watts

• 4 watts