Chapter 7 Review - Electrical Circuits

Question 1

Voltage

Answer 1

The amount of electrical potential per 1 coulomb of charge.

Question 2

Resistance

Answer 2

The property of any material that shows the flow of electrons.

Question 3

Ohm’s Law

Answer 3

The mathematical relationship comparing voltage, current, and resistance.

Question 4

Resistor

Answer 4

An electrical component with a set amount of resistance that slows down current and transform electrical energy into other forms of energy.

Question 5

Formula for Voltage

Answer 5

V= IR

Question 6

Unit for Voltage

Answer 6

Volts (V)

Question 7

Unit for Current

Answer 7

Amperes (A)

Question 8

Unit for Resistance

Answer 8

Ohms (omega)

Question 9

Formula for Current

Answer 9

I = V~R

Question 10

Formula for Resistance

Answer 10

R = V~I

Question 11

Current

Answer 11

The continuous flow of charge in a complete circuit.

Question 12

The current is the same throughout the circuit.

Answer 12

Series.

Question 13

Adding a resistor will decrease the total resistance of the circuit.

Answer 13

Parallel.

Question 14

The voltage across each resistor in the circuit is the same.

Answer 14

Parallel.

Question 15

There is only one pathway for electrons to flow.

Answer 15

Series.

Question 16

Adding a resistor will increase the total resistance of the circuit.

Answer 16

Series.

Question 17

There is more than one pathway for current to flow.

Answer 17

Parallel.

Question 18

As more cells are added to the circuit, the brightness of the light bulb increases.

Answer 18

Series.

Question 19

There are junction points in the circuit.

Answer 19

Parallel.

Question 20

If the current through one load in the circuit goes to 0A, the current through all other loads remains the same.

Answer 20

Parallel.

Question 21

The sum of the voltages across the loads equals the total voltage supplied by the battery.

Answer 21

Series.

Question 22

The total current entering a junction point equals the sum of the current leaving junction point.

Answer 22

Parallel.

Question 23

T or F?

An electric circuit is a complete pathway through which electrons can flow.

Answer 23

True.

Question 24

T or F?

An electric load transforms light energy into electrical energy.

Answer 24

False. electrical energy

other forms of energy.

Question 25

T or F?

Light bulbs, heaters, and batteries are all example of electric loads.

Answer 25

True.

Question 26

T or F?

The wire through which electric current flows is a conductor.

Answer 26

True.

Question 27

T or F?

A switch is the source of electric potential energy in a circuit.

Answer 27

False. Switch
The battery (cell).

Question 28

T or F?

Circuit diagrams use circuit symbols to illustrate actual electrical circuits.

Answer 28

True.

Question 29

T or F?

Current electricity is charge the remains stationary on an insulator.

Answer 29

False. Remains stationary on an insulator.

Moves through a conductor.

Question 30

T or F?

Electric current is the amount of charge passing a point in a conducting wire each second.

Answer 30

True.

Question 31

T or F?

Electric current is measured in Volts.

Answer 31

False. Volts.

Amperes.

Question 32

T or F?

An ammeter is used to measure the current in a circuit.

Answer 32

True.

Question 33

Series Circuit.

Resistors increase. Current,

Answer 33

Stays the same.

Question 34

Series Circuit.

Resistors increase. Resistance,

Answer 34

Increases.

Question 35

Parallel Circuit.

Resistors increase. Current,

Answer 35

Drops.

Question 36

Parallel Circuits.

Resistors increase. Resistance,

Answer 36

Stays the same.

Question 37

Resistance is increased in a circuit.

Answer 37

Voltage will increase and current will decrease.