Question

The output voltage of a voltage amplifier has been found to decrease by 20% when a load resistance of 1 kΩ is connected. What is the value of the amplifier output resistance?

(a) 50Ω

(b) 200Ω

(c) 250Ω

(d) 350Ω

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Answer 1

The correct answer is (c) 250Ω

To explain: 250 / (1000 + 250) X 100% = 20%. Hence the output resistance is 250 ohm.