Basic Circuit and Electrical Concepts

The center of the atom is called the __________.

• Electron

• Proton

• Nucleus

• Circuit

Electrons have a __________ charge and __________ the nucleus of an atom.

• Neutral; surround

• Negative; orbit

• Positive; orbit

• Negative; repel

__________ is the most common metal used in wiring.

• Iron

• Copper

• Aluminum

• Steel

The voltage in a AA battery is __________ volts, and in a wall outlet is __________ volts.

• 3; 100

• 1.5; 120

• 1.5; 220

• 9; 240

All circuits have three parts: a source of __________, a device that uses __________, and __________.

• Resistance; power; wire

• Electricity; energy; wiring

• Current; energy; resistor

• Voltage; current; switch

The circuit must be __________ for it to work.

• Short

• Closed

• Open

• Overloaded

If one light goes out in a series circuit, __________.

• Only that light goes out

• All lights go out

• The brightness decreases slightly

• Nothing happens

In a parallel circuit, if one light goes out, __________.

• All lights go out

• The other lights stay on

• The brightness decreases slightly

• Nothing happens

Adding more lights to a series circuit __________ the brightness of each bulb.

• Decreases

• Increases

• Has no effect

• Shortens the circuit

In a parallel circuit, the brightness of each bulb __________ as more lights are added.

• Decreases

• Increases

• Stays the same

• Becomes uneven