Transformers Level 1 Study Guide - Questions with Complete Solutions

Transformers Level 1 Study Guide - Questions with
Complete Solutions

When a magnetic circuit reaches a point of saturation, ? .
a.
the waveform comes out of distortion and will smooth out as the circuit enters
into over-saturation


b.
the electromagnet will be in the entry-level strength


c.
further increases in flux density are not possible


d.
the transformer is operating at its optimum region Right Ans - c.
further increases in flux density are not possible

On a graph of a normal magnetization curve, which properties are
represented on the two axes?

I. Field intensity (H)
II. Flux density (B)
III. Magnetic domain (M)
IV. Saturation (S) Right Ans - I and II

Each normal magnetization curve, or B-H curve, has a knee where increases in
the field strength no longer have much effect on the magnetic flux density. As
more magnetic flux gets forced into the same area, more magnetic domains
are available to be aligned. Therefore, it takes less and less force (H) to get
smaller and smaller amounts of magnetic flux (B).

True or False Right Ans - False

, A ? is an electric device that uses electromagnetism to change voltage from
one level to another or to isolate one voltage from another.

a.
condenser


b.
power distribution panel


c.
power switchboard


d.
transformer Right Ans - d.
transformer

? is the property of a device or circuit that causes it to store energy in a
magnetic field.

a.
Inductance


b.
Induction


c.
Mutual induction


d.
Self-induction Right Ans - a.
Inductance

n a transformer, the conductor is the wire making up the coil.