Practice # 6 AC Theory

Front

The frequency is the number of __________________ of AC per second (1 second).

Back

cycles

Front

The time required for a sine wave to complete one full cycle is called a ________________.

Back

period

Front

When a loop conductor is rotated in a magnetic field, a __________ is induced in each side of the loop.

Back

voltage

Front

The value of an induced emf depends on which of the following factors?

Back

1. Number of wires moving through the magnetic field 2. Strength of the magnetic field 3. Speed of rotation

Front

What is the primary advantage of using AC in electrical systems?

Back

AC allows for efficient power distribution over long distances.

Front

Define 'alternation' in the context of AC theory.

Back

An alternation refers to one complete cycle of the AC waveform.

Front

What is the relationship between frequency and period in AC?

Back

Frequency (f) is the reciprocal of the period (T): f = 1/T.

Front

What is the unit of frequency?

Back

Hertz (Hz), which is equivalent to cycles per second.

Front

Explain the term 'induced emf'.

Back

Induced emf is the voltage generated in a conductor when it is exposed to a changing magnetic field.

Front

What factors affect the strength of induced emf?

Back

1. The speed of the conductor's movement through the magnetic field 2. The strength of the magnetic field 3. The length of the conductor.