# Differential Amplifier with Active Load MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Differential Amplifier with Active Load”.

1. What is the problem with a single operational differential amplifier with active load?
a) High input resistance
b) Low input resistance
c) Low output resistance
d) High output resistance

2. What is the total voltage gain of a differential amplifier with active load if the gain of first stage is 4.8 and the gain of the second stage is 1.2?
a) 6.75
b) 6.55
c) 5.76
d) 5.65

3. What is the voltage gain of a differential amplifier with active load?
a) 1
b) 0
c) ∞
d) Cannot be determined

4. What is the total voltage gain of a differential amplifier with active load if input of first stage is 50V and the output of the second stage is 100V?
a) 20
b) 0.2
c) 2.5
d) 2

5. How do we calculate the output voltage of a differential amplifier with active load?
a) VO = -Ad × Vd + AC × VC
b) VO = -Ad × Vd – AC × VC
c) VO = Ad × Vd + AC × VC
d) VO = Ad × Vd – AC × VC

6. How many methods of coupling are used for a differential amplifier with active load?
a) 3
b) 4
c) 2
d) 5

7. How is the voltage gain measured in a differential amplifier with active load?
a) Volts
b) Ampere
c) Decibels
d) Dimensionless

8. What is the purpose of using a differential amplifier with active load?
a) Increase voltage gain
b) Decrease voltage gain
c) Increase current gain
d) Decrease current gain

9. What is the total voltage gain of a differential amplifier with active load if the gain of first stage is 10dB, gain of the second stage is 20dB and gain of third stage is 30dB?
a) 60.32dB
b) 50dB
c) 60dB
d) 50.32dB

10. The coupling device is essential for a differential amplifier with active load.
a) True
b) False