Vocab
A battery has stored energy which is referred to as a form of _________?
A) Mechanical energy
B)Static Electricity
C) Kinetic Energy
Big D) Potential force
Big D
Ohm's Law =
V = IxR
The south pole of a magnet will ______.
A) attract another south pole
B) repel a north pole
C) attract a north pole
D) repel a paper clip
attract a north pole
Rubber
Another word for a Condom
How fast does electricity travel?
The speed of light
A device that converts mechanical energy into electrical energy is a(n):
A) battery
B) electric generator
C) transformer
d) electromagnet
Electric generator
Current is measured in what units?
Voltage is measured in what units?
Resistance is measured in what units?
Amperes
Watts
Ohm's
Atoms in a magnet are ______
A) arranged randomly
B)lined up
C)negatively charged
D)positively charged
lined up
How do insulators resist the flow of electricity?
Insulators hold their electrons tightly not allowing electricity to travel through them
Electricity dates back to:
1. Mesopotamia
2. Ancient Greeks
3. The 1800s
4. 1982
Particles in the solar wind react with ______ in the atmosphere to priduce the aurora.
A) clouds
B) water vapor
C) ice crystals
D) atoms
atoms
A circuit with 100 ohms of resistance and 20 volts has how much current flowing through it?
0.2 A
Cutting 1 eight inch magnet into equal 2 inch segments will result in how many north and south poles?
4N and 4S
Copper and gold are nearly the same in conductivity. Disregarding the PRICE difference, what is one reason GOLD can sometimes be a better choice versus copper
stability (copper is highly oxidative)
Why is there no scientific evidence that magnets can medically help you even though there is iron in your blood?
iron atoms are too few and too far apart
Current that does not reverse is called:
A) Alternating current
B) Circuit current
C) Direct current
D) Magnetic current
Direct
In a conventional circuit, how does current flow versus the flow of electrons
A) Both current and electrons move from + to -
B) Both current and electrons move from - to +
C) Current moves from + to -, electrons move from - to +
D) Current moves from - to +, electrons move from + to -
C) Current moves from + to -, electrons move from - to +
A current carrying wire wrapped around an iron ore is called a(n):
A) generator
B) conductor
C) transformer
D) electromagnet
Electromagnet
Rank in order of conductivity:
Glass
Copper
Gold
Silver
Aluminum
Silver
Copper
Gold
Aluminum
Glass
What is Mr. Carnahan's REAL age?
45.2 million Millenium
Changing the current changes the _____ of an electromagnet.
A)Strength
B)Weight
C)Charge
D)Resistence
strength
To prevent overloading in a parallel circuit you could install a:
1. Power meter
2. Fuse
3. Electric generator
4. Light bulb
Fuse
The core of an electromagnet is usually made of ?
Iron
Which of the following has the least resistance?
A)a short, thick metal wire
B)a long, narrow wire
C)a short, narrow wire
D)a long, thick wire
short, thick
LED bulbs use how much less electricity when compared to a normal incadescent bulb?
a) 10%
b) 45%
c) 80%
d) 90%
TRICK QUESTION! Cameron sat on it and the bulb broke