Part Two Of Science Preap 9 Weeks Test

Question 1

According to ohms law, resistance is equal to voltage divided by

Answer 1

Current

Question 2

According to ohms law, what is the resistance of a light if the voltage is 9.0 volts and the current is 3.0 amps

Answer 2

30 ohms

Question 3

In a series circuit with three bulbs,

Answer 3

All of the bulbs become dimmer as more bulbs are added

Question 4

In a parallel circuit with three bulbs,

Answer 4

current from each bulb has its own path

Question 5

What effect would a current of greater than 0.2 amp have on your body

Answer 5

It could cause burns and stop your heart

Question 6

The charge on a proton is

Answer 6

Positive, and the charge on an electron is negative

Question 7

A complete, unbroken path through which electric charges can flow is a

Answer 7

Electric circuit

Question 8

Materials that allow the charges of an electric current to move freely through them are called

Answer 8

Conductors

Question 9

What is an insulator

Answer 9

Something that electric charges can’t flow though easily

Question 10

Examples of insulators and conductors

Answer 10

Insulators: rubber wood rope plastic

Conductors: metals including gold aluminum silver copper iron

Question 11

A device used to open and close an electric circuit is an

Answer 11

Switch

Question 12

Power is calculated by multiplying voltage by

Answer 12

Current

Question 13

The ampere is a unit of

Answer 13

Electric current

Question 14

If a households voltage is 120 volts, what is the power rating of a light bulb with 0.5 amps of current flowing through it

Answer 14

60 watts

Question 15

The electromagnetic spectrum consists of

Answer 15

All of the different types of electromagnetic waves

Question 16

A range of colors formed when white light passes through a prism is called a

Answer 16

Spectrum

Question 17

Electromagnetic waves can transfer energy without a

Answer 17

Medium

Question 18

In a vacuum, all electromagnetic waves have the same

Answer 18

Speed

Question 19

Visible light has a higher frequency than

Answer 19

Infrared rays

Question 20

The electromagnetic waves with the highest frequencies are called

Answer 20

Gamma rays

Question 21

What is transferred by electromagnetic waves

Answer 21

Electromagnetic radiation

Question 22

Which electromagnetic waves have the longest wavelengths and lowest frequencies

Answer 22

Radio waves

Question 23

The speed of an electromagnetic wave is equal to

Answer 23

Wavelength times frequency

Question 24

Cell phone signals are transmitted by

Answer 24

Radio waves

Question 25

What is a series circuit

Answer 25

A circuit with only one path

Question 26

What is a parallel circuit

Answer 26

A circuit with more than one path

Question 27

What type of wave has the highest frequency

Answer 27

Gamma rays

Question 28

What type of wave has the greatest energy

Answer 28

Gamma rays

Question 29

What is the order of the waves

Answer 29

Radio 
Microwave 
Infrared 
Colors R.O.Y.  G.  B.I.V. 
Ultraviolet
X-Ray 
Gamma

Question 30

What are the three triangle methods

Answer 30

V=volts over
R=ohms times Ī=amps

P=watts over
V=volts times Ī=amps

V=wavespeed m/s
F=frequency Hz times À=wavelength m