Analog and Digital Electronics - Online Test
Q1. For the Op-Amp circuit shown in the figure, V is
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. 
Consider the following Sum of Products expression, F.
The equivalent Product of Sums expression is
Answer : Option A
Explaination / Solution:
Q3. In the following sequential circuit, the initial state (before the first clock pulse) of the circuit is Q1Q0 = 00. The state (Q1Q0), immediately after the 333rd clock pulse is
Answer : Option B
Explaination / Solution:
Q4. In the Op-Amp circuit shown, assume that the diode current follows the
equation I = Ise P(V VT). For Vi = V, V = V, and for Vi = V, V = V. The relationship between V and V is
Answer : Option D
Explaination / Solution:
Here the inverting terminal is at virtual ground and the current in resistor and
diode current is equal i.e. 
Q5. A Boolean function f(A,B,C,D) = ∏(1,5,12,15) is to be implemented using an 8×1
multiplexer (A is MSB). The inputs ABC are connected to the select inputs S2S1S0 of the
multiplexer respectively. 
Which one of the following options gives the correct inputs to pins 0,1,2,3,4,5,6,7 in order?
Answer : Option B
Explaination / Solution:
Q6. Consider the Op-Amp circuit shown in the figure. 
The transfer function V(s) Vi(s)
Answer : Option A
Explaination / Solution:
Q7. 
Consider the following circuit which uses a 2-to-1 multiplexer as shown in the figure below. The Boolean expression for output F in terms of A and B is
Answer : Option D
Explaination / Solution:
Q8. Consider the Op-Amp circuit shown in the figure.
If 
then the minimum and maximum
values of ϕ (in radians) are respectively
then the minimum and maximum
values of ϕ (in radians) are respectively
Answer : Option C
Explaination / Solution:
Q9. The current state QAQB of a two JK flip-flop system is 00. Assume that the clock rise-time is much
smaller than the delay of the JK flip-flop. The next state of the system is
Answer : Option C
Explaination / Solution:
Q10. In the Digital-to-Analog converter circuit shown in the figure below, VR = 1V and R = 1kΩ
The voltage V is
Answer : Option C
Explaination / Solution:
No Explaination.
