Electricity and Circuits Quiz

A voltage of one volt applied across a resistance of one ohm produces a current of one ampere. If the voltage is doubled and the resistance is halved, then the current _____.

• doubles

• increases four times

• increases three times

• remains the same

A battery produces voltage using _____.

• electromagnetism

• heat

• chemical action

• pressure

The force that causes electrons to flow is most commonly called _____.

• current

• resistance

• voltage

• power

According to Ohm's law, the amount of current in a circuit is equal to the _____.

• voltage divided by the resistance

• voltage multiplied by the resistance

• resistance minus the voltage

• voltage plus the resistance

If a circuit has 10A of current and 12Ω of resistance, the applied voltage is _____.

• 1.2V

• 2V

• 10V

• 120V

Which of the following is considered a good conductor of electricity?

• Porcelain

• Germanium

• Silicon

• Copper

If the voltage source of a circuit supplies 240V and the resistance measures 5Ω, the current in the circuit is _____.

• 20A

• 25A

• 48A

• 235A

The power distribution component used to raise and lower voltage is the _____.

• battery

• conductor

• transformer

• joule

Which of the following values is measured by placing a meter in series with the load?

• Voltage

• Current

• Power

• Resistance

If the resistance of a circuit is 100Ω and the current is 5A, the power is _____.

• 5W

• 50W

• 500W

• 2,500W