555 Timer MCQs : This section focuses on the "555 Timer" in Linear Integrated Circuits. These Multiple Choice Questions (MCQs) should be practiced to improve the Linear Integrated Circuits skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
The 555 Timer IC got its name from the three _______ resistors that are used in its voltage divider network.
Explanation: The 555 Timer IC got its name from the three 5KΩ resistors that are used in its voltage divider network.
The 555 Timer IC is an _______ pin mini Dual-Inline Package
Explanation: The 555 Timer IC is an 8 pin mini Dual-Inline Package
555 Timer mainly useful for generating ___________ wave forms.
Explanation: 555 Timer mainly useful for generating non-sinusoidal wave forms.
The pictorial representation showing the internal details of a 555 Timer is known as?
A. simple diagram
B. functional diagram
C. exceptional diagram
D. All of the above
Explanation: The pictorial representation showing the internal details of a 555 Timer is known as functional diagram.
The functional diagram of a 555 Timer IC consists of _______ comparators.
Explanation: The functional diagram of a 555 Timer IC consists of two comparators: an Upper Comparator (UC) and a Lower Comparator (LC).
555 Timer IC is useful for generating accurate time delays and oscillations
C. Can be true or false
D. Can not say
Explanation: True, 555 Timer IC is useful for generating accurate time delays and oscillations.
Determine the time period of a monostable 555 multivibrator.
A. T = 0.33RC
B. T = 3RC
C. T = 1.1RC
D. T = RC
Explanation: The time period of a monostable 555 timer is T = RC×ln(1/3) = 1.1.RC.
How to obtain symmetrical waveform in Astable multivibrator?
A. Use clocked RS flip-flop
B. Use clocked D-flip-flop
C. Use clocked T-flip-flop
D. Use clocked JK flip-flop
Explanation: Symmetrical square wave can be obtained by adding a clocked JK flip-flop to the output of Astable multivibrator. The clocked flip-flop acts as a binary divider to the times output and produces 50% duty cycle without any restriction on the choice of resistors.
A 555 timer in monostable application mode can be used for
A. Pulse position modulation
B. Frequency shift keying
C. Speed control and measurement
D. Digital phase detector
Explanation: In monostable operation mode, if input trigger pulses are generated from a rotating wheel, the circuit will determine the wheel speed whenever it drops below a predetermined value. Therefore, it can be used for speed control and measurement.
This 555 Timer IC can be operated with a DC supply of +5V to +18V.
C. Can be yes or no
D. Can not say
Explanation: Yes, This 555 Timer IC can be operated with a DC supply of +5V to +18V.