Circuit Test

Question 1

Know _____________ flow in a circuit:

Answer 1

electrons

Question 2

Current flows from ___________ to ___________:

Answer 2

negative to
positive

Question 3

AMPs Symbol

Answer 3

Circle with an A inside

Question 4

Volts Symbol

Answer 4

Circle with a V inside

Question 5

Motors Symbol

Answer 5

Circle with an M inside

Question 6

Lamp Symbol

Answer 6

Circle with an L inside

Question 7

Switch Symbol

Answer 7

–o o– with a line on top of first the –o.

Question 8

Explain a series circuit.

Answer 8

all components are connected end to end. If there is an opening anywhere then the current will not flow.

Question 9

Explain a parallel circuit.

Answer 9

Parallel: current has options to flow so if there is an opening,
one component can still turn on because charges have an
alternate route.

Question 10

2 examples of devices/appliances that use AC.

Answer 10

TV remote and laptop

Question 11

2 examples of devices/appliances that use DC.

Answer 11

AC: fan and lamp

Question 12

Define Voltage:

Answer 12

The ‘electrical push’ which the cell gives to the current.

Question 13

Define amps:

Answer 13

units used to measure the volume of flow of
electrons/current. Measured with a ammeter.

Question 14

Define volts:

Answer 14

units used to measure the potential energy
supplied by the battery cell. Measured with a voltmeter.

Question 15

How are Amps and voltage distributed in a series circuit

Answer 15

Amp is the same through, but voltage is shared in between components in a series circuit.

Question 16

Define insulator:

Answer 16

material that allows the flow of electrons
easily.

Question 17

Define conductor:

Answer 17

material that does not allow the flow of
electrons easily.

Question 18

Black is

Answer 18

negative

Question 19

Red is

Answer 19

positive

Question 20

What powers a circuit?

Answer 20

battery cell

Question 21

Determine if the following materials are insulators or conductors: string, rubber band, play-doh, stapler, scissors, paper clip, plastic

Answer 21

Conductors: stapler, play-doh, scissors, paper clip
Insulators: string, rubber band, plastic

Question 22

What happened to the LED light when you added a 4th lead to
your circuit?

Answer 22

The light was dimmer because a 4th lead (alligator clip)
added resistance, which is opposing the flow of current.

Question 23

What happened to the fan when you added an extra lead to
your circuit?

Answer 23

The blade spun slower because the extra lead (alligator
clip) added resistance.