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Electricity

100

For electrons to flow a circuit must be __________?

closed

200

What do we call the space around a charged object that can attract other nearby objects?

electric field 

300

What type of circuit only has one pathway for electrons to follow?

series circuit 

400

What two variables affect the strength of an electric field?

distance and charge 

500

What is the difference between STATIC electricity and CURRENT electricity?

static electricity is the build up and transfer of electrons and current electricity is a steady flow of electrons 

Magnetism

100

Opposite poles of a magnet will_________?

attract

200

Where is the magnetic field the strongest?

at the poles

300

What three metals tend to be magnetic?

iron, cobalt, nickel

400

How do electrons move to produce magnetism?

they are all spinning in the same direction

500

What can you do to ALIGN magnetic domains?

use another magnet OR electricity

Electromagnets

100

What does an electromagnet use to align spinning electrons?

electricity

200

How can you increase the strength of an electromagnet?

more electric current 

300

Electromagnets are useful because they can be turned on/off and the strength can be adjusted. True or False

True

400

For electromagnetic induction a large magnet spins inside a coil of wire. How does this make electricity?

the magnet gets the electrons to flow through the wire to produce a current 

500

List three uses for electromagnets. 

industrial - lifting heavy things 

technology - speakers, phones, MRI 

door locks

breaks on rollercoaster

motors and generators 

Ohm's Law

100

For a toaster that draws a current of 8 amps and has a resistance of 10 ohms, what is the voltage across it?

80 volts

200

If a 12 volt battery will produce 4 amps of current in a circuit, what is the resistance in the circuit?

3 ohms

300

For an appliance that draws a current of 5 amps and has a resistance of 5 ohms, what is the voltage across it?

25 volts

400

If a 50 volt source is connected to a wire with 10 ohms of resistance, how much current is flowing through the wire?

5 amps

500

If a 50 volt source is connected to a wire with 10 amps of current, what is the resistance of the wire?

5 ohms

Random

100

How do we measure the SPEED of flowing electrons?

Amps 

200

What type of current has electrons that switch the direction that they are flowing?

alternating current 

300

What is the measure of HOW MANY electrons there are?

Voltage

400

What charge does an electron have?

negative

500

If a 100 volt battery will produce 20 amps of current in a circuit, what is the resistance in the circuit?

5 ohms