Multivibrators and 555 Timer Questions and Answers
Practice ModeShowing 10 of 45 questions
Q1
What is the function of the comparators in the 555 timer circuit?
Answer: Option B
Q2
When a capacitor charges:
Answer: Option D
Q3
The ________ is defined as the time the output is active divided by the total period of the output signal.
Answer: Option C
Q4
A 22-k resistor and a 0.02-F capacitor are connected in series to a 5-V source. How long will it take the capacitor to charge to 3.4 V?
Answer: Option B
Q5
What does the discharge transistor do in the 555 timer circuit?
Answer: Option D
Q6
Pulse stretching, time-delay, and pulse generation are all easily accomplished with which type of multivibrator circuit?
Answer: Option B
Q7
The internal circuitry of the 555 timer consists of ________, an R-S flip-flop, a transistor switch, an output buffer amplifier, and a voltage divider.
Answer: Option C
Q8
With most monostable multivibrators, what is the Q output when no input trigger has occurred?
Answer: Option A
Q9
An astable multivibrator requires:
Answer: Option C
Q10
A crystal demonstrates the ________ effect when a mechanical force across the crystal causes a small voltage to be generated.
Answer: Option C