quiz

QUIZ 1 D2 - A

26/02/13

1. Consider the following schematic diagram:

If Vi = 1.5 V, what is Vo (in volts)? a. 4.5kVb. 0.45Vc. 45kVd. 4.5Ve. 45V

2. An inexpressive first cousin to the instrumentation amplifier is the basica. differential amplifierb. instrumentation amplifierc. V to I convertord. I to V convertor

3. Op-amp is a:a.Voltage-controlled voltage source (VCVS)b.Voltage-controlled current source (VCCS)c.Current-controlled voltage source (CCVS)d.Current-controlled current source (CCCS)

4. Calculate the output voltage if R1 = R2 = R3 = 100 , R4 = 1 k, and V1 = V2 = V3 = 50 mV.a.1.5Vb.-1.5Vc.0Vd.50mV

V2

V1

V3

5. For the circuit shown in the following fig, the capacitance C is initially uncharged.At t = 0, the switch S is closed. The Voltage Vc across the capacitor at t= 1 millisecond isIn the fig, the opamp is supplied with ±15Va.0Vb.6.3Vc.9.45Vd.10V

=1microF

10V

6. An active load is used in the collector of differential amplifier of op – amp to

a.Increase the output resistanceb.Increase the differential gain Ad c.Increase maximum peak output voltaged.Eliminate load resistance from the circuit

7. Compensating networks are used in op-amp to(a) improve the stability(b) increase the BW(c) decrease the gain(d) none of the above

8. When an op amp has no feedback path or loop, the voltage gain is maximum.

a.Trueb.False

9. Consider the following schematic diagram: If Vin = 1.5 V, and Vref = 2.5 V, what is Vout (in volts)?a.2.5mVb.2.5Vc.1.5Vd.15Ve.None of the above

10. If we increase the compensating capacitor, the unity gain bandwidth will(a) increase(b) decrease(c) remain the same(d) none of the above