Magnetism
Electricity
Ohms Law
Circuits
100
What happens when two north poles of a magnet face each other
They repel
100
Electricity is the flow of _____________
Electrons
100
What is the formula for Ohm's law?
V=I*R
100
What is a parallel circuit?
A circuit with more than 1 path for electrons to flow
200
You wrapped a wire around a metal cylinder attached it to a battery.
What did you make?
Electromagnet
200
Which type of electricity occurs from a build up of charge on a surface?
Static
200
If voltage is kept constant and I increase resistance on a circuit, what happens to the current?
It decreases.
200
What is a series circuit?
A circuit where there is only one path for electrons to flow
300
How can you test on your electromagnet which end is the north pole and which end is the south pole?
Use a bar magnet
(If it repels, the poles are the same. If it attracts, the poles are opposite)
300
What happens when an object has an equal amount of positive and negative charge?
The object becomes neutral (has no charge)
300
What is the resistance in a circuit that has 15 A and 300 V
20 Ω
300
If you turn on the microwave, it doesn't turn everything else on in the kitchen.
This is because all households use these kinds of circuits.
Parallel circuits
400
Why is it that when paperclips stick to a magnet, other paperclips will stick to that paperclip.
The magnetism traveled through the paperclip.
400
When current is reversed in an electromagnet, what happens to the magnetic field?
The poles (north and south) reverse
400
A circuit has a voltage of 500 V and a resistance of 100 Ω. What is the current?
5 Amps or 5 A
400
What happens to the other bulbs if one goes out? Why?
They all go out. This is a series circuit and the electron path is cut.
500
Name three things that make an electromagnet stronger. Be specific about more or less.
(Must name three things to get any points)
More Voltage
More Current
More Coils
Less Coil Gap
The Kind of Metal in the Nail
500
Carlos builds a simple circuit with two resistors (R1, R2) and a switch (S). He opened the switch and current flowed through resistor R1 but not R2.
Draw the circuit that Carlos built (LABEL THE RESISTORS)
Circuit drawing should be a parallel circuit with a switch on the circuit with resistor R2.
500
Current and voltage are directly proportional. Show me a graph that depicts this relationship.
Graph should show a straight, increasing, diagonal line.
500
Draw me a parallel circuit with two bulbs.
Circuit should still work if I erase one of your bulbs.