What is the definition of a conductor?

• Materials that allows electricity to flow through easily.

• Materials that does not allow electricity to flow through easily.

• Materials that allow electricity to flow through only under certain conditions.

• None of the above

What is the definition of an insulator?

• Materials that allows electricity to flow through easily.

• Materials that does not allow electricity to flow through easily.

• Materials that allow electricity to flow through only under certain conditions.

• None of the above

What is the definition of a semiconductor?

• Materials that allows electricity to flow through easily.

• Materials that does not allow electricity to flow through easily.

• Materials that allow electricity to flow through only under certain conditions.

• None of the above

Which is an example of conductor?

• silver

• acrylic

• wood

• pvc pipe

Which components are semiconductors?

• diode, copper wire, buzzer

• LED, thermistor, motor

• LDR, copper wire, resistor

• thermistor, diode, LED

Which is an advantage of mains power supply?

• not portable

• able to transmit high power over a long distance

• requires conversion to DC for electrical appliances

• limited power supply

Which is an advantage of battery?

• not portable

• limited supply of power

• stable supply of power over long period of time

• can be used directly on products without conversion

Electric current is measured in ___________.

• farad

• ohms

• amperes

•  watts

Which is true about alternating current (AC)?

• it continually changes direction in a circuit

• it is able to transmit large amount of power over long distances efficiently

• mains power supply has AC

• it has to be transformed to DC using transformers

• all of the above

Which diagram shows current supply from the mains power?

• X

• Y