What is the input impedance of a transistor amplifier circuit if I1 = 10mA, I2 = 20mA, V1 = 25V, V2 = 15V?

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answerhappygod
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What is the input impedance of a transistor amplifier circuit if I1 = 10mA, I2 = 20mA, V1 = 25V, V2 = 15V?

Post by answerhappygod »

a) 0.5kΩ
b) 2kΩ
c) 1.5kΩ
d) 2.5kΩ
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