LMS SUBSTATION IV YEAR 2 LESSON 11 REVIEW QUESTIONS AND ANSWERS LATEST UPDATE 2025/2026

LMS SUBSTATION IV YEAR 2 LESSON 11 REVIEW QUESTIONS AND ANSWERS LATEST
UPDATE 2025/2026

Whenever ? flows through a conductor, a magnetic field is created.

a. current

b. electromotive force

c. inductance

d. voltage - Answers a. current

The ability of a moving or changing magnetic field to induce a voltage into a conductor is called ?
.

a. conduction

b. coupling

c. inductance

d. reaction - Answers c. inductance

When a conductor that is cutting through a magnetic field changes direction, the ? of the
induced voltage will be reversed.

a. frequency

b. intensity

c. polarity

d. velocity - Answers c. polarity

If the current flowing through a conductor decreases, the magnetic field around the conductor
will increase.

True

False - Answers False

Another term for counter EMF is ? EMF.

a. back

b. opposing

c. residual

, d. reverse - Answers a. back

Lenz's Law states, "An induced voltage or current opposes the motion that created the induced
voltage or current."

Select one:

True

False - Answers True

The induced voltage is ? out of phase with the applied voltage.

a. 0°

b. 90°

c. 180°

d. 360° - Answers c. 180°

Maximum EMF is induced when a conductor cuts a magnetic field at ? .

a. 0°

b. 90° and 270°

c. 180°

d. 360° - Answers b. 90° and 270°

Cutting more magnetic lines of force per second will increase the amount of voltage induced
into a conductor.

True

False - Answers True

When there is no current flowing through a conductor, the magnetic field around the conductor
is ? .

a. decreasing

b. increasing

c. not present

d. reversing - Answers c. not present

The unit of inductance is called the ? .