A-level Physics · Potential dividers
Potential divider output
Find V_out = V_in R₂/(R₁ + R₂), with or without a load, or the R₂ needed for a given output.
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Question 1
A potential divider has a 5 V supply across a 15 kΩ resistor (R₁) in series with a second resistor (R₂). The output, taken across R₂, must be 3.4 V. Calculate the resistance of R₂. Give your answer to 3 significant figures.
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