Chapter 4

An x-ray tube is an example of current flow in:

• Gas

• Vacuum

• Metallic conductor

• Ionic solution

Which of the following increases or decreases voltage by a fixed amount:

• Capacitor

• Rheostat

• Diode

• Transformer

The unit of measure for electric potential is:

• Volt

• Amp

• Ohms

• Watt

What is the magnetic classification of materials weakly attracted to magnets?

• Nonmagnetic

• Ferromagnetic

• Paramagnetic

• No such classification

Which of the following allows electrons to flow in only one direction?

• Transformer

• Rheostat

• Battery

• Diode

The removal of electrons from an object by rubbing it with another is electrification by:

• Contact

• Friction

• Induction

• Grounding

Nearly all discussion of electricity deals with the movement of:

• Positive charges

• Negative charges

• Neutrons

• All of the above

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NGSS.HS-PS3-5

More coils on the secondary side of a transformer represents:

• Increased voltage

• Decreased voltage

• No change in voltage

The rheostat is found on the:

• Primary circuit

• Secondary circuit

• Filament

High frequency rectified current has _____% voltage ripple.

• <1%

• 13%

• 3.5%

• 100%