Negative charges ____ each other.
Positive charges ____ each other.
A negative and a positive charge ____ each other.
1. repel
2. repel
3. attract
100
What does Ohm's Law state?
R = V/C
100
Who created the first electric battery?
Alessandro Volta
100
What is a fuse?
A safety device that contains a thin strip of metal that will melt if there is too much current through it.
200
On the board, draw the electric fields around charged particles when there is a positive and negative charge.
p--n
p--n
p--n
200
What is the difference between a parallel and series circuit?
parallel has more than one path.
series has one path.
200
What is an electrode?
A metal part of an electrochemical cell, which gains or loses electrons. *The terminal is the part of the electrode above the surface of the electrolyte.*
200
Without a fuse of circuit breaker, what might happen in a house with an overloaded electric circuit.
The current could stop and lights would turn off.
300
What is static electricity?
The buildup of charges on an object.
300
What materials make good insulators? What about conductors?
Insulators: Glass, rubber, wood, sand, and plastic
Conductors: silver, copper, aluminum, and iron
300
What three materials were used to make the first electric battery?
silver, zinc, and paper soaked in salt water
300
What is a short circuit?
A connection that allows current to take the path of least resistance.
400
The loss of static electricity as electric charges transfer from one object to another is called ______?
Static discharge
400
What is resistance? If the resistance increased, the current would _________?
The measure of how difficult it is for charges to flow through a material.
Decrease
400
What is chemical energy?
Energy stored in chemical compounds.
400
What is a circuit breaker?
A reusable safety switch that breaks the circuit when the current gets too high.
500
What are the three methods charges can be transferred to build up static electricity?
Friction, conduction, induction
500
In a circuit, there is a 0.8-A current in the bulb. The voltage across the bulb is 4.0 V. What is the bulb's resistance?