electricity and magnetism

static electricity

the accumulation of excess electric charge on an object

electricity

the flow of electrons

electric current

The continuous flow of electric charges through a material

open circuit

an electrical circuit that is not complete.

closed circuit

a complete circuit through which electricity flows

series circuit

An electric circuit with only one path through which charge can flow

parallel circuit

A circuit that contains more than one path for current flow.

Voltage

an electromotive force or potential difference expressed in volts.

Resistance

A material's opposition to the flow of electric current.

conductor

A material that allows heat and electricity to pass through it.

Insulator

A material that does not allow heat or electrons to move through it easily.

semiconductor

A substance that can conduct electricity under some conditions

permanent magnet

A magnet made of material that keeps its magnetism

electromagnet

a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil

Generator

A machine that converts mechanical energy into electrical energy

motor

a machine that converts electrical energy into mechanical energy

Ohm's Law

the current in a circuit equals the voltage difference divided by the resistance

What is Ohm's Law formula?

Ohm's Law states that the current (I) in a circuit equals the voltage (V) divided by the resistance (R), expressed as I = V/R.

If a circuit has a voltage of 12 volts and a resistance of 3 ohms, what is the current?

Using Ohm's Law, I = V/R = 12V / 3Ω = 4 A.

What is the resistance in a circuit if the voltage is 24 volts and the current is 2 amperes?

Using Ohm's Law, R = V/I = 24V / 2A = 12 Ω.

If a circuit has a current of 5 amperes and a resistance of 10 ohms, what is the voltage?

Using Ohm's Law, V = I*R = 5A * 10Ω = 50 V.

How does increasing resistance affect current when voltage remains constant?

According to Ohm's Law, if resistance increases while voltage remains constant, the current decreases