# Recent questions

Describe the difference between direct and alternating current.

Briefly define each of the following: (a) 1 coulomb (b) 1 volt (c) 1 ampere (d) 1 ohm.

Write the formulas for each of the following statements: (a) current is the time rate of change of charge (b) charge is current accumulated over a period of time.

Why is it that protons are not considered a source of moving charges for current flow?

Explain the difference between electron flow and conventional current.

List the particles in the nucleus of an atom.

What is another name for an insulator?

List at least two examples that show how static electricity can be generated.

Briefly describe the electric field of a static charge.

What is the mathematical relationship between resistance and conductance?

Is the power line voltage available in our homes a dc or an ac voltage?

Describe the difference between an open circuit and a short circuit.

List three important characteristics of an electric circuit.

Explain why potential difference is necessary to produce current in a circuit.

How does the resistance of a conductor compare to that of an insulator?

What is the smallest unit of a compound with the same chemical characteristics?

Define the term ion.

In a metal conductor, what is a free electron?

Name two good conductors, two good insulators, and two semiconductors.

Electrical quantities (symbol and basic unit)

A) Watt B) Volts C) Farad D) Ampere

Options: A) Yellow B) No colour C) White D) Blue

Options: A) WATT B) AMPERE C) VOLTS D) OHM

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