Circuits Thursday

If you remove one bulb from a series circuit with three bulbs, the circuit becomes a(n) _________ circuit.

• open
• short
• closed
• parallel

What happens to the other bulbs in a series circuit if one bulb burns out?

• The other bulbs will get brighter
• The other bulbs will also go out.
• The other bulbs will start flickering
• The other bulbs will change color

When more bulbs are added to a series circuit, each lamp becomes _____________. Brighter or dimmer?

• Dimmer
• More colorful
• Louder
• Brighter

When batteries are connected in series, the voltage across them ____________. Increases, decreases or stays the same?

• Increases
• Fluctuates
• Decreases
• Remains constant

Draw a circuit diagram of a series circuit with two batteries, two light bulbs, one resistor, one LED, and one switch.

In a parallel circuit, if one bulb breaks, what happens to the remaining bulbs?

• They also go out

• They get dimmer

• They stay lit at the same brightness

• They get brighter

What is the effect of adding more batteries in parallel to a circuit?

• Increases voltage

• Decreases voltage

• Increases current

• Voltage remains the same

You have a small circuit with a single light bulb. The light bulb is connected to a 9-volt battery. The resistance of the light bulb is measured to be 18 ohms.

• 1.5 Amperes
• 2 Amperes
• 0.25 Amperes
• 0.5 Amperes

In a simple electrical circuit, you have a device that operates at a current of 2 amperes when connected to a 12-volt power supply.

• The device has a resistance of 8 ohms.
• The device has a resistance of 6 ohms.
• The device has a resistance of 4 ohms.
• The device has a resistance of 10 ohms.

How does the total resistance of a circuit change when resistors are added in series?

• It decreases

• It remains the same

• It increases

• It fluctuates