LED chaser with 555 Timer

1. Which is the 'Ground' pin in 555 timer IC?

• Pin 1
• Pin 2
• Pin 3
• Pin 8

2. Full form of LED?

• Light Emitting Device.
• Low Energy Device
• Light Emitting Diode.
• Light Entering Diode

3. A circuit uses a resistor to?

• To control the LED.
• To break the circuit.
• To control the current.
• work as a switch.

4. Which of the following component can be designed for opposing the flow of current is named as?

• Insulators
• Resistors
• Conductors
• Jumper Wires

5. Capacitor is used to………in an electric circuit?

• increase current
• increase resistance
• store the charges
• decrease current

6. Unit of capacitance?

• watt
• farad
• ohm
• volt

7. Which Pin in 555 timer IC is a 'VCC' pin?

• Pin 4
• Pin 6
• Pin 8
• Pin 1

8. Resistors are devices with __________?

• With both negative terminal.
• With both positive terminal.
• With One positive and one negative terminal.
• with no polarity at both terminal.

9. The typical value of voltage of LED is (for this experiment)?

• 12v
• 9v
• 3v
• 1.5v

10. How many pins do a 555 timer consist of?

• 12
• 6
• 7
• 8