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Analog Electronics — question 1 of 10

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You build an inverting amplifier using an op-amp with an input resistor Rin = 2kΩ and a feedback resistor Rf = 20kΩ, driven by a DC input of 50mV. Walk me through how you'd find the output voltage, and explain what role the 'virtual ground' assumption plays in getting there.

This one resolves to a number. Give the value in the field below and your reasoning in the box — the number is checked exactly, by arithmetic.

mV

Units and SI prefixes are understood, including schematic notation: 4k7, 2.2 uF, 1.5e-3 A.

How sure are you?

Being confidently wrong costs more mastery than admitting a guess — that is deliberate, and it is how misconceptions get found.

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