21. The input-output characteristic of an amplifier is
A. Linear function
B. Non-Linear function
C. Sinusoidal function with the change of phase
D. None of the mentioned
22. The amplifier works as a linear system for:
A. High-frequency signals
B. Low-frequency signals
C. Small signals
D. Large signals
23. In the MOSFET amplifier, the input is applied as:
A. Voltage across gate and source
B. Voltage across drain and source
C. Current at gate
D. Current at Drain
24. In the MOSFET amplifier, the parameter that changes due to the changes in input is:
A. Small signal drain current
B. Large signal drain current
C. Voltage across substrate and source
D. None of the mentioned
25. Input impedance of MOSFET amplifier in Common Source configuration is:
A. Very high at high frequencies
B. Very high at low frequencies
C. Very low at high frequencies
D. Very low at low frequencies
26. In the below input-output characteristic of the MOSFET amplifier, if Vin > Vin1, the MOSFET is said to operate in:
A. Saturation region
B. Cutoff region
C. Triode region
D. None of the mentioned
27. The voltage gain of the MOSFET is given by:
A. Av = -βRd
B. Av = γRd
C. Av = -gmRd
D. None of the mentioned
28. The MOSFET is said to be in a diode-connected configuration if:
A. A diode is placed between supply and drain
B. A diode is placed between source and ground
C. Source and gate are connected
D. Drain and gate are connected
29. The diode-connected MOSFET acts as:
A. Active element for amplification
B. Voltage source
C. Current Source
D. Load Impedance
30. In the below circuit, if the levels of input and output vary, the gain is found to:
A. Increase linearly as input level increases
B. Decrease linearly as output level decreases
C. Remain constant
D. Vary non linearly