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WorksheetsElectronics II Quiz
Total questions: 11
Worksheet time: 3mins
What does "IC" stand for in electronics?
A) Internal Component
B) Integrated Circuit
C) Input Current
D) Insulated Chip
Why is the 555 timer called "555"?
A) It was the 555th invention of Signetics
B) It uses three 5kΩ resistors internally
C) It operates at 555 Hz
D) It has 5 inputs and 5 outputs
3. How many pins does a 555 timer IC have?
A) 6
B) 7
C) 8
D) 9
What is inside a 555 timer IC?
A) Flip-flops, comparators, resistors, and transistors
B) Only a single transistor
C) A microcontroller
D) A set of logic gates
In monostable mode, the 555 timer produces a pulse when:
A) Power is turned ON
B) Triggered by an external pulse
C) The reset pin is HIGH
D) The threshold voltage exceeds 2V
What is the function of the discharge pin (Pin 7) in a 555 timer?
A) Charges the capacitor
B) Controls the output voltage
C) Discharges the timing capacitor
D) Supplies power to the circuit
In astable mode, the 555 timer:
A) Continuously oscillates without external trigger
B) Requires a trigger for each pulse
C) Can only produce a single pulse
D) Works as a simple voltage regulator
What determines the output frequency in an astable 555 circuit?
A) The resistor and capacitor values
B) The input voltage
C) The output current
D) The duty cycle
In a 555 monostable circuit, increasing the capacitor value will:
A) Increase the output pulse duration
B) Decrease the output voltage
C) Have no effect
D) Make the circuit astable
What is the typical voltage range of a 555 timer?
A) 4.5V to 15V
B) 1V to 5V
C) 9V to 24V
D) 12V to 30V
What is the name of the study room we are sitting in right now?
462
464
465
461
