Part Two Of Science Preap 9 Weeks Test Flashcards
According to ohms law, resistance is equal to voltage divided by
Current
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
In a series circuit with three bulbs,
All of the bulbs become dimmer as more bulbs are added
In a parallel circuit with three bulbs,
current from each bulb has its own path
What effect would a current of greater than 0.2 amp have on your body
It could cause burns and stop your heart
The charge on a proton is
Positive, and the charge on an electron is negative
A complete, unbroken path through which electric charges can flow is a
Electric circuit
Materials that allow the charges of an electric current to move freely through them are called
Conductors
What is an insulator
Something that electric charges can’t flow though easily
Examples of insulators and conductors
Insulators: rubber wood rope plastic
Conductors: metals including gold aluminum silver copper iron
A device used to open and close an electric circuit is an
Switch
Power is calculated by multiplying voltage by
Current
The ampere is a unit of
Electric current
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
The electromagnetic spectrum consists of
All of the different types of electromagnetic waves
A range of colors formed when white light passes through a prism is called a
Spectrum
Electromagnetic waves can transfer energy without a
Medium
In a vacuum, all electromagnetic waves have the same
Speed
Visible light has a higher frequency than
Infrared rays
The electromagnetic waves with the highest frequencies are called
Gamma rays
What is transferred by electromagnetic waves
Electromagnetic radiation
Which electromagnetic waves have the longest wavelengths and lowest frequencies
Radio waves
The speed of an electromagnetic wave is equal to
Wavelength times frequency
Cell phone signals are transmitted by
Radio waves
What is a series circuit
A circuit with only one path
What is a parallel circuit
A circuit with more than one path
What type of wave has the highest frequency
Gamma rays
What type of wave has the greatest energy
Gamma rays
What is the order of the waves
Radio Microwave Infrared Colors R.O.Y. G. B.I.V. Ultraviolet X-Ray Gamma
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
