Electricity

In a metal wire an electric current is due to the movement of:

• protons

• neutrons

• electrons

• ions

Which one of the following instruments measures resistance?

• Ammeter

• Voltmeter

• Ohm's meter

• None of the above

Rubbing amber with fur produces:

• direct current.

• static electricity.

• alternating current.

• electromagnetism.

Which one of the following is a conductor?

• Plastic

• Glass

• Rubber

• Iron

Which one of the following best describes the function of the switch in a circuit?

• Provides the power

• Turns the circuit on/off

• Converts the electrical energy to another form of energy

• Provides the resistance

The unit used to measure electric current is:

• amperes

• ohms

• volts

• joules

Which one of the following instruments measures current?

• Ammeter

• Voltmeter

• Ohmmeter

• Wattmeter

6 V battery is connected to a 3 Ω resistor. The current through the resistor is closest to:

• 0.5 A

• 1.0 A

• 2.0 A

• 3.0 A

Which one of the following is an insulator?

• Iron

• Rubber

• Copper

• Carbon

Which one of the following best describes the function of the battery in a circuit?

• Provides the power

• Turns the circuit on/off

• Converts the electrical energy to another form of energy

• Provides the resistance