Part Two Of Science Preap 9 Weeks Test Flashcards Preview

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Flashcards in Part Two Of Science Preap 9 Weeks Test Deck (30)
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1

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

Current

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

30 ohms

3

In a series circuit with three bulbs,

All of the bulbs become dimmer as more bulbs are added

4

In a parallel circuit with three bulbs,

current from each bulb has its own path

5

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

It could cause burns and stop your heart

6

The charge on a proton is

Positive, and the charge on an electron is negative

7

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

Electric circuit

8

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

Conductors

9

What is an insulator

Something that electric charges can't flow though easily

10

Examples of insulators and conductors

Insulators: rubber wood rope plastic

Conductors: metals including gold aluminum silver copper iron

11

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

Switch

12

Power is calculated by multiplying voltage by

Current

13

The ampere is a unit of

Electric current

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

60 watts

15

The electromagnetic spectrum consists of

All of the different types of electromagnetic waves

16

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

Spectrum

17

Electromagnetic waves can transfer energy without a

Medium

18

In a vacuum, all electromagnetic waves have the same

Speed

19

Visible light has a higher frequency than

Infrared rays

20

The electromagnetic waves with the highest frequencies are called

Gamma rays

21

What is transferred by electromagnetic waves

Electromagnetic radiation

22

Which electromagnetic waves have the longest wavelengths and lowest frequencies

Radio waves

23

The speed of an electromagnetic wave is equal to

Wavelength times frequency

24

Cell phone signals are transmitted by

Radio waves

25

What is a series circuit

A circuit with only one path

26

What is a parallel circuit

A circuit with more than one path

27

What type of wave has the highest frequency

Gamma rays

28

What type of wave has the greatest energy

Gamma rays

29

What is the order of the waves

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

30

What are the three triangle methods

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