Electricity and Magnetism

Front

the relationship between voltage, current, and resistance is called __________ Law

Back

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance.

Front

We buy power from utility companies in....

Back

Energy; kWh (kilowatt-hour) is the unit of energy used to measure electricity consumption.

Front

A SERIES circuit has 3 light bulbs. You remove 2 of the lightbulbs from the circuit and now have a complete circuit with 1 light bulb. Will the remaining light bulb be brighter, dimmer, or stay the same?

Back

Brighter. In a series circuit, removing bulbs increases the voltage across the remaining bulb, making it brighter.

Front

You can increase the strength of an electromagnet by increasing the current, adding iron to the core, and .....

Back

increasing the number of coils on the magnet. More coils create a stronger magnetic field.

Front

An electric current in a metal consists of moving __________

Back

electrons. In metals, electric current is carried by the flow of electrons.

Front

What is voltage?

Back

Voltage, measured in volts, is the electric potential difference between two points in a circuit.

Front

What is current?

Back

Current, measured in amperes (amps), is the flow of electric charge in a circuit.

Front

What is resistance?

Back

Resistance, measured in ohms, is the opposition to the flow of electric current in a conductor.

Front

What happens to the total resistance in a series circuit when more resistors are added?

Back

The total resistance increases. In a series circuit, the total resistance is the sum of all individual resistances.

Front

What happens to the total resistance in a parallel circuit when more resistors are added?

Back

The total resistance decreases. In a parallel circuit, adding more paths for current reduces the overall resistance.