DC Review Part I-2020

A basic principle of electromagnetism: the magnetic field is ______________ to the current that created it.

• perpendicular

• 180 degrees

• parallel to the current

• opposite

Saturation is the condition where all the material has been completely magnetized. The domain theory says saturation occurs when all the _____________ are lined up in the same direction.

• domains

• atoms

• electrons

• protons

The property that creates a magnetic field is called ________ force.

• magnetic

• electromotive

• magnetomotive

• magnetic flux

>Like charges repel is the basic law of:

• attraction

• magnetism

• sameness

What component is measured in ohms?

• capacitor

• coil

• resistor

• battery

>Atoms have subatomic particles which are:

• fire, water, and oxygen

• Proton, electrons, and neutrons

• gas, charges, and force

A electrical shock could cause a severe problem if current flows from one hand to the other, right through the heart. An immediate symptom could be _______________ or cardiac arrest.

• loss of vision

• loss of hearing

• fibrillation

• numbness

The insulator is used to allow current or voltage to freely flow.

• True

• False

Use caution when talking to someone that is operating equipment or working in electrical circuits. A distraction could cause:

• equipment to become damaged

• personal injury

• damage to metering equipment

• all of these

The basic time-related power unit is the ______.

• farads

• ohm

• amp

• joule