Circuits and Ohm's Law

You have 4 light bulbs in a series circuit, you add 3 more in series. What would happen to the brightness of the bulbs?

• the bulbs would not glow
• the glow would be dimmer
• the bulbs would be brighter
• the brightness will stay the same

Choose 3 answers. Resistance in a wire is affected by which of the following:

• color of the wire
• length of the wire
• flexibility of the wire
• temperature
• thickness of the wire

Look at the diagram below: If one bulb burns out, how will the other bulbs be affected?

• other bulbs go out
• other bulbs are dimmer
• other bulbs stay lighted
• light changes color

How much voltage will Yamiley need to produce a 2 ampere current through a 79 ohm resistor?

• 158 Volts

• 0.03 Volts

• 75 Volts

• 39.5 V

• 77 Volts

How much current flows through a 81 ohm light bulb when Morgan connects it with a 120 volt source?

• 1.48 A

• 201 A

• 0.675 A

• 39 A

• 177.78 A

A complete, unbroken path that charges can flow through is called an __________________.

• conductor
• electric circuit
• electric current
• insulator

What is current measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

Eileen tried each of these setups to make a working circuit.

In which setup would the bulb light?

• Setup A

• Setup B

• Setup C

• Setup D

Tasha made this model. In her model the bulb is not lit.

Which of these statements best explains why the bulb is not lit?

• The wires are connected to the wrong battery terminals.

• The bulb is burned out.

• The switch is open.

• A wire is missing.

As the resistance in a circuit increases, the electric current __________.

• increases
• decreases
• stays the same