2 If the current passing into the BJT at A is 15 μA, and hFE is 100, the current flowing through R2 is: Select one of ... A) 100 mA. B) 100 μA. C) 1.5 mA. D) 15 mA.
3 In Question 2, the voltage at the junction of R2 and C2 is: Select one of ... A) VCC − 0.0015 × R2. B) 0.0015 × R2. C) 1.5 × R2. D) VIN + 0.0015 × R2.
4 The voltage difference between points A and B: Select one of ... A) is approximately 0.7 V. B) depends on VCC. C) depends on R1. D) equals VCC/2.
5 The version of the amplifier on the right above is biased by R1 and R2. The effect of this is: Select one of ... A) to increase gain. B) to increase the input impedance. C) to decrease gain. D) to produce a stable quiescent output voltage.
6 The voltage gain of the right-hand version" Select one of ... A) depends on the small signal current gain of the transistor. B) is −R3/R4. C) is increased. D) is stabilised.
7 Wiring a by-pass capacitor in series with R4: Select one of ... A) reduces the output voltage. B) improves the amplification of high-frequency signals. C) increases the voltage gain. D) has no effect.
9 Its voltage gain: Select one of ... A) is approximately 100. B) is approximately 1. C) depends on the small signal current gain of the transistor. D) depends on the resistance of R4.
10 R4 and C2 make up a : Select one of ... A) low-pass filter. B) high impedance output stage. C) improve the stability of the amplifier. D) high-pass filter.
