Current & Voltage

What is the difference between a cell and a battery?

• A cell is bigger than a battery
• A battery has more energy than a cell
• A cell has more energy than a battery
• A battery is bigger than a cell

What is the role of a battery/power pack in an electric circuit?

• To transfer energy to neutrons
• To transfer energy to photons
• To transfer energy to electrons
• To transfer energy to protons

What is the function of a switch in an electric circuit?

• To break the circuit and stop the electric current
• To decrease the electric current
• To change the direction of the electric current
• To increase the electric current

What is the unit of measurement for current?

• Ohms
• Amperes
• Watts
• Volts

What is current?

• Electric charge is a measure of how much current flows
• Current is a measure of how much electric charge flows
• They have no relationship
• They are the same thing

What is potential difference?

• A measure of the difference in energy between two parts of a circuit
• A measure of the difference in charge between two parts of a circuit
• A measure of the difference in resistance between two parts of a circuit
• A measure of the difference in voltage between two parts of a circuit

What is the unit of measurement for potential difference?

• Amperes
• Watts
• Volts
• Ohms

What happens to potential difference if you change the number of cells?

• The more cells, the smaller the potential difference
• The same as the potential difference across a component
• The same as the current flowing through the circuit
• The more cells, the bigger the potential difference

What is needed for an electric current to flow?

• A complete path for neutrons
• A complete path for protons
• A complete path for electrons
• A complete path for photons

What is the device used to measure potential difference?

• Voltmeter
• Ammeter
• Wattmeter
• Ohmmeter