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Electric Field Fundamentals

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Questions and Answers

What is the physical field that surrounds electrically charged particles?

Electric field (correct)

Gravitational field

Nuclear field

Magnetic field

When do charged particles exert repulsion forces on each other?

When their charges are opposite

When they are not in motion

When their charges are the same (correct)

When their charges are neutral

What is the force that holds atomic nuclei and electrons together in atoms?

Electromagnetic force (correct)

Weak nuclear force

Gravitational force

Strong nuclear force

According to Coulomb's Law, what happens to the force between charges as the distance between them increases?

Decreases Signup and view all the answers

What are manifestations of the electromagnetic field?

Magnetic fields Signup and view all the answers

Explain the difference between alternating current (AC) and direct current (DC) in terms of direction and magnitude of flow.

AC periodically reverses direction and changes its magnitude continuously with time, while DC flows only in one direction. Signup and view all the answers

What is the usual waveform of alternating current in most electric power circuits?

The usual waveform of alternating current in most electric power circuits is a sine wave. Signup and view all the answers

Give an example of an application where different waveforms of alternating current are used, and explain why.

Guitar amplifiers use different waveforms such as triangular waves or square waves to produce specific sounds. Signup and view all the answers

Why is electrical energy distributed as alternating current instead of direct current?

AC voltage may be easily increased or decreased with a transformer, making it more suitable for distribution. Signup and view all the answers

What types of information can be carried by audio and radio signals on electrical wires, and how are they carried?

Audio and radio signals carry sound or images, and they are sometimes carried by modulation of an AC carrier signal. Signup and view all the answers