Voltage and Resistance

Fill in the blank: The unit of electrical potential energy is the ________.

• Joule (J)

• Watt (W)

• Coulomb (C)

• Volt (V)

Match the following terms with their correct definitions:

• Device that measures voltage

• Potential difference

• The difference in electric potential between two points

• Electric cell

• Device that provides electrical energy

• Voltmeter

What phenomenon is described as being caused by friction between molecules in a thundercloud, leading to an electrical potential difference within the cloud?

• Lightning

• Rainfall

• Hailstorm

• Tornado

What is an electric cell?

• A device that stores chemical energy and can produce an electric current when a circuit is created between the two terminals of the cell

• A device that converts kinetic energy into electrical energy

• A device that stores thermal energy

• A device that produces light energy

In a battery, which form of energy is converted to electrical energy?

• Kinetic energy

• Chemical energy

• Radiant energy

• Thermal energy

In a diesel generator, chemical energy is first converted to ______ energy, then to electrical energy.

What is the SI unit of measurement for potential difference?

• Volt (V)

• Ampere (A)

• Ohm (Ω)

• Watt (W)

What is the SI unit of measurement for energy?

• Joule (J)

• Watt (W)

• Newton (N)

• Pascal (Pa)

What is the formula for potential difference (V) in terms of electrical potential energy (E) and amount of charge (Q)?

• V = E / Q

• V = Q / E

• V = E × Q

• V = Q - E

How much electrical energy (in joules) does a 9 V battery supply to each coulomb of charge that passes through it?

• 1 joule

• 9 joules

• 18 joules

• 0.9 joules