For \( C E \) transistor amplifier, the audio signal voltage across the collector resistor of \(...

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For \( C E \) transistor amplifier, the audio signal voltage across the collector resistor of \( 2 \mathrm{k} \Omega \) is \( 4 \mathrm{~V} \). If the current amplification factor of the transistor is 100 and the base resistance is \( 1 \mathrm{k} \Omega \) then the input signal voltage is
(a) \( 100 \mathrm{mV} \)
(b) \( 20 \mathrm{mV} \)
(c) \( 30 \mathrm{mV} \)
(d) \( 15 \mathrm{mV} \)
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