Quiz about Electricity and Magnetism Review Physical

Question 1

The force or push that causes electric charges to move is called _______.

Accepted Answer

voltage difference

Answer

resistance

Answer

current

Answer

static electricity

Question 2

Electric charges always flow from __________ areas to __________ areas.

Accepted Answer

B. negative, positive

Answer

A. positive, negative

Answer

C. positive, neutral

Answer

D. neutral, negative

Question 3

A material through which electrons do NOT flow easily is a(n) _______.

Accepted Answer

insulator

Answer

fuse

Answer

conductor

Answer

circuit breaker

Question 4

Which of the following statements about electric charge is true?

Accepted Answer

B. Electrical forces act at a distance.

Answer

A. Objects must be touching one another to exert electrical force.

Answer

C. Air cannot conduct electricity; it is conducted only by solid materials.

Answer

D. Opposite electric charges always repel one another.

Question 5

Mr. Robinson and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?

Accepted Answer

plastic plate

Answer

silver spoon

Answer

copper wire

Answer

gold necklace

Question 6

Which of the following will increase the resistance of a wire?

Accepted Answer

increasing the temperature of the wire

Answer

using a thicker/wider wire

Answer

using a shorter wire

Answer

using silver instead of copper

Question 7

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?

Accepted Answer

1.8 amps

Answer

45 amps

Answer

0.022 amps

Answer

8.8 amps

Question 8

Which two areas of physical science are closely related to the development of electric motors and generators?

Accepted Answer

electricity and magnetism

Accepted Answer

electricity and sound

Answer

sound and light

Answer

light and magnetism

Question 9

Which of the following will decrease the strength of the magnetic field around a wire?

Accepted Answer

using less loops around the iron core

Answer

increasing the current flowing through the wire

Answer

flipping the direction of the current flowing through the wire

Answer

using a larger iron core

Question 10

What voltage would produce a current of 100 amps?

Accepted Answer

1.98 V

Answer

0.000198 V

Answer

5,050 V

Answer

100.0198 V

Question 11

This contains a piece of metal that melts if it gets too hot in order to open a circuit.

Accepted Answer

fuse

Answer

conductor

Answer

insulator

Answer

circuit breaker

Question 12

What does the symbol labeled #1 represent?

Accepted Answer

battery

Answer

light

Answer

resistor

Answer

switch

Question 13

What does the symbol labeled #2 represent?

Accepted Answer

light

Answer

battery

Answer

resistor

Answer

switch

Question 14

Use the circuits below to answer questions 12-16. Circuit ______ is wired in parallel, and circuit ______ is wired in series.

Accepted Answer

A. A; B

Accepted Answer

B. B; A

Question 15

Use the circuits below to answer questions 12-16. Circuit ______ represents the way homes are usually wired.

Accepted Answer

A. A

Answer

B. B

Question 16

Circuit ______ is the type of circuit that causes an entire string of lights to go out when one of the bulbs burns out.

Accepted Answer

A

Answer

B

Question 17

The function of a generator is to change ___________.

Accepted Answer

chemical energy to electrical energy

Accepted Answer

mechanical energy to electrical energy

Answer

electrical energy to chemical energy

Answer

electrical energy to mechanical energy

Question 18

This exerts a force that causes other electric charges to move.

Accepted Answer

B. electrical fields

Answer

A. electrical poles

Answer

C. insulators

Answer

D. conductors

Question 19

Which circuit below contains the greatest voltage?

Accepted Answer

A circuit with a current of 20 amps and a resistance of 16 ohms

Accepted Answer

A circuit with a current of 25 amps and a resistance of 16 ohms

Accepted Answer

A circuit with a current of 20 amps and a resistance of 10 ohms

Answer

A circuit with a current of 10 amps and a resistance of 10 ohms

Question 20

What is the current of the circuit in the picture to the right?

Accepted Answer

60 amps

Accepted Answer

0.6 amps

Answer

60 J

Answer

0.6 Watts

Question 21

What process is the method by which a neutral object obtains an electrical charge from a distance?

Accepted Answer

D. induction

Answer

A. convection

Answer

B. conduction

Answer

C. radiation

Question 22

Which of the following objects would NOT be a good insulator of electric charge?

Accepted Answer

skin

Answer

wood

Answer

plastic

Answer

rubber

Question 23

Which symbol below would represent a device that can easily turn the circuit on or off?

Accepted Answer

(switch symbol)

Answer

V (voltmeter symbol)

Answer

(battery symbol)

Answer

(lamp symbol)

Question 24

The Law of Conservation of Charge states that ____________.

Accepted Answer

charge cannot be created and destroyed but it can be transferred.

Answer

charge can be created and destroyed but NOT transferred.

Answer

charge cannot be created and destroyed and it cannot be transferred.

Answer

none of the above

Question 25

Which of the following statements is true about the circuit to the right?

Accepted Answer

There are 2 batteries, 2 switches, and 2 resistors.

Answer

There are 2 batteries, 2 switches, and 3 resistors.

Answer

There is 1 battery, 2 switches, and 3 resistors.

Answer

There are 3 batteries and 3 resistors.

Question 26

26. Alexandra was preparing to go on a hike in the woods. She gathered the equipment she would need and placed it on the kitchen counter. By chance, she placed her compass near an electrical outlet. Although the compass was not moving, the compass needle turned because ____________.

Accepted Answer

the electric current in the outlet produced a magnetic field

Answer

the compass could only be used outdoors

Answer

the kitchen counter was made of a magnetic substance

Answer

the kitchen had a microwave oven

Question 27

In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, the current going through the resistor increases. Why does this occur?

Accepted Answer

C. As the electrons are pushed more by the battery, they move faster through the circuit.

Answer

A. As the electrons are sped up, they bunch closer together.

Answer

B. As the electrons have more energy, they vibrate more rapidly.

Answer

D. As the distance around the circuit increases, the electrons take longer to travel around.

Question 28

What is the charge of the plastic ink dots themselves?

Accepted Answer

B. negative

Answer

A. electron

Answer

C. neutral

Answer

D. positive

Question 29

Opposite charges ________________. Like charges _______________.

Accepted Answer

attract, repel

Answer

repel, attract

Answer

neutralize, neutralize

Answer

combine, separate

Question 30

Electric charge flows from _____________ voltage to __________ voltage.

Accepted Answer

higher, lower

Answer

lower, higher

Answer

equal, equal

Answer

negative, positive

Question 31

To increase the current, you should _______________ voltage and _______________ resistance.

Accepted Answer

increase, decrease

Answer

decrease, increase

Answer

increase, increase

Answer

decrease, decrease

Question 32

Charges can act at a distance by exerting a(n) _________________________ which is an example of charging by _____________________.

Accepted Answer

electric field, induction

Answer

magnetic field, conduction

Answer

gravitational field, friction

Answer

nuclear force, radiation

Question 33

Explain how lightning is created. Include which type of electric charge transfer it is.

Accepted Answer

Lightning is created by the transfer of both positive and negative charges.

Answer

Lightning is created by the transfer of positive charges.

Answer

Lightning is created by the transfer of negative charges.

Answer

Lightning is created by the transfer of neutral charges.

Question 34

A battery works by converting chemical energy into what type of energy?

Accepted Answer

Electrical energy

Answer

Thermal energy

Answer

Mechanical energy

Answer

Nuclear energy

Question 35

Which of the following are factors that affect resistance in a circuit?

Accepted Answer

Length of the conductor

Answer

Material of the conductor

Answer

Temperature of the conductor

Answer

Cross-sectional area of the conductor

Question 36

Which components are needed to draw a series circuit with two batteries, two resistors, a lamp, and a switch to turn the whole thing off?

Accepted Answer

Two batteries, two resistors, a lamp, and a switch

Answer

One battery, one resistor, a lamp, and a switch

Answer

Two batteries, one resistor, a lamp, and a switch

Answer

One battery, two resistors, a lamp, and a switch

Question 37

Which of the following diagrams represents a parallel circuit with one battery, four lamps, switches to turn each lamp off AND a switch to turn off the entire circuit?

Accepted Answer

Diagram C

Answer

Diagram A

Answer

Diagram B

Answer

Diagram D

Question 38

Which of the following are differences between series and parallel circuits, and what is a real-world example of each?

Accepted Answer

In a series circuit, components are connected end-to-end, while in a parallel circuit, components are connected across common points. A real-world example of a series circuit is a string of old Christmas lights, and a parallel circuit example is the wiring in a house.

Answer

In a series circuit, components are connected across common points, while in a parallel circuit, components are connected end-to-end. A real-world example of a series circuit is the wiring in a house, and a parallel circuit example is a string of old Christmas lights.

Answer

In a series circuit, the current is divided among components, while in a parallel circuit, the voltage is divided. A real-world example of a series circuit is a car battery, and a parallel circuit example is a flashlight.

Answer

In a series circuit, the voltage is divided among components, while in a parallel circuit, the current is divided. A real-world example of a series circuit is a flashlight, and a parallel circuit example is a car battery.

Question 39

Find the total resistance and the current in the circuit below. (4 pts)

Accepted Answer

The question has a diagram associated with it. The diagram has been stored separately.

Answer

The total resistance is 10 ohms and the current is 2 amperes.

Answer

The total resistance is 5 ohms and the current is 1 ampere.

Answer

The total resistance is 15 ohms and the current is 3 amperes.

Question 40

Find the total resistance and the voltage if the circuit has a current of 40 amps flowing through it. (4 pts)

Accepted Answer

Resistance: 10 ohms, Voltage: 400 volts

Answer

Resistance: 5 ohms, Voltage: 200 volts

Answer

Resistance: 8 ohms, Voltage: 320 volts

Answer

Resistance: 6 ohms, Voltage: 240 volts

Question 41

Explain the two ways we discussed to keep a house from overheating.

Accepted Answer

Insulating the house and using shades

Answer

Using air conditioning and fans

Answer

Opening windows and using light colors

Answer

Installing solar panels and using heavy curtains

Question 42

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Which of the following are ways to increase its strength?

Accepted Answer

Increase the number of coils and increase the current.

Answer

Decrease the number of coils and decrease the current.

Answer

Use a smaller core and reduce the voltage.

Answer

Use a larger core and decrease the current.

Question 43

Ferromagnetism involves the alignment of which of the following in atoms?

Accepted Answer

Electrons

Answer

Protons

Answer

Neutrons

Answer

Nuclei

Question 44

What is the total resistance in a parallel circuit with two batteries creating 200 V of potential difference and three lamps on separate branches with resistances of 3 ohms, 4 ohms, and 2 ohms?

Accepted Answer

1.09 ohms

Answer

2.5 ohms

Answer

3 ohms

Answer

4 ohms

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