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Potential Divider Question Issac Physics help

Please help me answer these two questions. Any help is appreciated!



The 8.0Ω resistance in this circuit is a loudspeaker (the battery represents the amplifier). The other resistor is replaced with a variable resistor which can take the values between and 30Ω, and is used as a volume control. This volume control changes the voltage across the speaker.

a) What is the minimum possible voltage across the speaker?

b) What is the maximum possible voltage across the speaker?
(edited 3 years ago)
It'll probably help to write the equation for Vout (the PD across the 8 ohms)

In terms of R1 R2 and Vin

It should come out looking like a fraction

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