Circuits

• A

• B

• C

• D

Which of the following devices measures current in an electric circuit?

• an ammeter

• an ohmmeter

• a voltage meter

• a resistor

In a closed circuit, how does battery voltage affect current?

• As voltage increases, current increases.

• As voltage increases, current decreases.

• Voltage has no affect on current.

• If voltage exceeds current, a short circuit circuit will develop.

In a series circuit, the voltage is the same everywhere in the circuit.

• True

• False

Which of the symbols represents current in an electrical circuit?

• I

• C

• E

• R

An electrical circuit is powered by a 1.5-volt battery and contains a light bulb producing 5 Ohms of resistance. There is also another 5 Ohm resistor connected in series in the circuit. How many amps of current are in this circuit? HINT: V = IR

• 0.15 amps

• 15.0 amps

• 6.67 amps

• 1.50 amps

An electrical circuit is powered by a 12-volt battery and contains a light bulb. The current flowing in the circuit is 20 amps. What is the resistance of the light bulb? HINT: V = IR

• 0.6 Ohms

• 240 Ohms

• 1.67 Ohms

• 12 Ohms

An electrical circuit is powered by a battery and contains a light bulb producing 1.5 Ohms of resistance. The circuit is flowing at 4 amps of current. What is the voltage of the battery?

HINT: V = IR

• 6.0 volts

• 1.5 volts

• 9.0 volts

• 12.0 volts

What will happen if one light bulb is removed from this circuit?

• The other bulbs will go out.
• The other bulbs will stay on
• The other bulbs will get dimmer.
• The battery will become stronger.

When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________.

• parallel

• series