What is the circuit symbol for a filament lamp?

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What does a current/voltage graph look like for a filament lamp?

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What is the formula that links current, resistance, and voltage?

voltage (V) = current (I) x resistance (R)


V = IR

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Which component does this circuit symbol represent?

A diode.

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What does a diode do?

Diodes only allow current to flow one way around a circuit.

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What does a current/voltage graph look like for a diode?

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For wires and resistors, how does temperature affect resistance?

Increasing the temperature will increase the resistance.

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What does a current/voltage graph look like for a fixed resistor?

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Why does increasing the temperature of a wire increase its resistance?

At higher temperatures, the particles in the wire vibrate faster, which impedes (slows) the flow of electrons, increasing the resistance.

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What is the circuit symbol for a diode?

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