Transformer

In order for electromagnetic induction to occur, there must be relative............between a magnetic field and a conductor.

• race

• Motion

• field

• voltage

The magnetic field produced by an alternating current can be thought of as a ............................... magnetic field.

• moving magnetic field

• dynamic magetic field

• electrodynamic magnetic field

• magnetic field

The transformer is a device used to .......... the value of a voltage.

• steady

• resist

• change

• anchor

If a transformer reduces voltage, it is called a....................... transformer.

• step left

• step right

• step up

• step down

If a transformer increases voltage, it is called a ......... transformer.

• step right

• step left

• step up

• step down

The winding of a transformer which is connected to a source of energy is called the ....... winding.

• primary

• secondary

• tertiary

If a transformer is operated with direct current, the current must be ........ in value, or it must be broken up into pulses.

• weighty

• light

• changed

• heavy

A Transformer is an example of a ........................... inductance

• mechanical

• electromagnetic

• transformer

The thin sheets of steel from which transformer cores are made are called...................

• lamination

• transformer

• copper

A laminated transformer core reduces the amount of energy that is wasted in the form of........

• solidifying

• flux

• heat