What is a potential divider?
A circuit that has two or more resistors in series with a power supply.
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A potential divider has two resistors in series. If the output voltage is half the supply voltage, the resistors must be..
identical
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What is the formula linking input voltage, output voltage and resistors R1 and R2?
Vout = output voltage (V)
Vin = input voltage (V)
R1 = resistance of resistor 1 (Ω)
R2 = resistance of resistor 2 (Ω)
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Give some uses of a variable potential divider.
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What would happen to ammeter reading if the circuit is placed in bright light?
The ammeter reading increases.
In bright light the LDR has a lower resistance, resulting in a higher circuit current.
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What would happen to the reading on the voltmeter if the circuit is placed in bright light?
The reading on the voltmeter increases.
In bright light the LDR has a lower resistance. The fixed resistor represents a greater proportion of the overall resistance.
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