Y9 sci Ohm's law intro

Recall which variable the symbol I represents. (capital i)

Recall which variable the symbol V represents.

Recall which variable the symbol R represents.

Recall which symbol is used to represent the units of resistance.

USE YOUR NOTES!

A lightbulb has a constant resistance.

The current entering the lightbulb is increased.

State what happens to the voltage across the lightbulb.

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A speaker has a constant resistance.

The current entering the speaker is not changed.

State what happens to the voltage across the speaker.

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A refrigerator has a constant resistance.

The voltage across the refrigerator is decreased.

State what happens to the current through the fridge.

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A toaster has a constant resistance.

The voltage across the toaster is increased.

State what happens to the current through the toaster.

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A battery in a circuit has a constant voltage.

The resistance of a bulb in the circuit is increased.

State what happens to the current through the bulb.

USE YOUR NOTES!

A battery in a circuit has a constant voltage.

The resistance of a bulb in the circuit is kept the same.

State what happens to the current through the bulb.

USE YOUR NOTES!

A battery in a circuit has a constant voltage.

The resistance of a bulb in the circuit is decreased.

State what happens to the current through the bulb.