W3 Electrical Fundamentals Quiz

What is the name given to the flow of electrons?

• Resistance

• Electric current

• Voltage

• Power

Electrons are attracted to the nucleus because:

• Both are negative

• They have the same charge

• Unlike charges attract

• Protons repel electrons

Which of the following is a conductor?

• Rubber

• Plastic

• Copper

• Ceramic

Which of the following is an insulator?

• Silver

• Aluminium

• Iron

• Rubber

Why can conductors allow electricity to flow?

• Electrons are firmly bound

• Protons move freely

• Outer electrons can move easily

• Current is blocked

The ability of an energy source to produce current is called:

• Resistance

• Electromotive force

• Potential energy

• Inductance

The unit of potential difference is:

• Ampere

• Ohm

• Volt

• Watt

Conventional current flows from:

• Negative to positive

• Positive to negative

• Neutral to ground

• Proton to neutron

Direct current (DC) results from:

• Alternating polarity

• Batteries

• AC supply

• Capacitors only

Resistance can be thought of as:

• Energy stored in a battery

• Opposition to current flow

• Attraction between charges

• Movement of protons