This set of Digital Electronics/Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Multivibrators”.
1. A multivibrator is an electronic circuit used to implement ____________
a) Oscillator
b) Timer
c) Flip-flop
d) All of the Mentioned
View Answer
Explanation: A multivibrator is an electronic circuit used to implement a variety of simple two-state systems and two state systems are an oscillator, timer, flip-flop. It produces an output when triggered.
2. Multivibrators are characterized by ____________
a) Registers
b) Capacitors
c) Transistors
d) All of the Mentioned
View Answer
Explanation: A multivibrator is an electronic circuit used to implement a variety of simple two-state systems and two state systems are an oscillator, timer, flip-flop. It produces an output when triggered. Multivibrators are characterized by amplifying devices (transistors) and cross coupled devices (registers, capacitors).
3. How many types of multivibrators are?
a) 2
b) 4
c) 5
d) 3
View Answer
Explanation: There are three types of multivibrator circuits depending on the circuit operation: (i) Astable, (ii) Bistable, and (iii) Monostable. Astable multivibrator is internally triggered, whereas the other two types are externally triggered.
4. Astable multivibrator is ________ in any state.
a) Stable
b) Unstable
c) Saturated
d) Both Stable & Saturated
View Answer
Explanation: Astable multivibrator, in which the circuit is not stable in either state i.e. it continually switches from one state to the other. It is internally triggered and does not have any stable state.
5. Monostable multivibrator is/has ________ state.
a) Stable
b) Unstable
c) One stable and another unstable
d) Independent
View Answer
Explanation: Monostable multivibrator, in which one of the states is stable, but the other state is unstable (transient). A trigger pulse causes the circuit to enter the unstable state. After entering the unstable state, the circuit will return to the stable state after a set time.
6. Bistable multivibrator is ________ in any state.
a) Stable
b) Unstable
c) Saturated
d) Independent
View Answer
Explanation: Bistable multivibrator is a type of multivibrator having two stable states. The circuit is stable in either state. It can be flipped from one state to the other by an external trigger pulse.
7. Bistable circuit is also known as ____________
a) Latch
b) Gate
c) Flip-flop
d) Bidirectional circuit
View Answer
Explanation: Bistable multivibrator circuit has the capability to store 1-bit of information. So, it is also known as flip-flop. Like Flip-flop, Bistable circuit also has 2 states.
8. Astable circuit acts as a/an ____________
a) Amplifier
b) Oscillator
c) Relaxation oscillator
d) Multiplexer
View Answer
Explanation: Astable circuit continually switches from one state to the other. It keeps oscillating between unstable states. Hence, it functions as a relaxation oscillator.
9. In an astable multivibrator, the amplifying elements are ____________
a) FET
b) JFET
c) OP-AMP
d) All of the Mentioned
View Answer
Explanation: Astable multivibrators are made with FET, JFET, OP-AMP or other types of amplifier. Astable circuit continually switches from one state to the other. It keeps oscillating between unstable states.
10. Monostable multivibrator can also be termed as ____________
a) Full astable multivibrator
b) Half astable multivibrator
c) Half bistable multivibrator
d) Full bistable multivibrator
View Answer
Explanation: Since, astable multivibrator is unstable and changes their states continually (It means that it can have both the states), whereas in monostable multivibrator, one of the states is stable, but the other state is unstable. SO Monostable Multivibrator is also known as Half-Astable Multivibrator.
11. The classic multivibrator circuit is known as ____________
a) Metal-coupled multivibrator
b) Plate-coupled multivibrator
c) Parallel-plate coupled multivibrator
d) Alternate-plate coupled multivibrator
View Answer
Explanation: The classic multivibrator circuit (also called a plate-coupled multivibrator) is first described by Henri Abraham and Eugene Bloch.
Sanfoundry Global Education & Learning Series – Digital Circuits.
To practice all areas of Digital Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
