Dynamic Electricity

Which of the following is the unit for current?

• Volt (V)

• Watt (W)

• Ampere (A)

• Ohm (Ω)

Which of the following is the unit for potential difference?

• Volt (V)

• Watt (W)

• Ampere (A)

• Ohm (Ω)

Which of the following is the electric charge that flows around in a circuit?

• Protons

• Neutrons

• Ions

• Electrons

A voltmeter can be used to measure ....

• potential difference

• resistance

• electrical energy

• current

Which of the following is an insulator?

• Aluminium plate

• Rubber eraser

• Copper wire

• Iron nail

Cells produce electrical energy by converting it from ....

• heat energy

• kinetic energy

• light energy

• chemical energy

In the water pipe model of current and potential difference, what does the water pump represent?

• battery

• bulb

• current

• wire

The magnitude of the current is measured with a device called ..

• ammeter

• voltmeter

• dynamometer

• thermometer

If the battery produced 12.6 Volts and what would the current flow be for a 6 Ohm resistor?

• 2.1 A

• 3.1 A

• 1.5 A

• 0.3 A

How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor

• 48 V

• 28 V

• 2.5 V

• 0.75 V