Automatic Door Bell

1. Which one of the following sensors is used for the automatic door opening system?

• IR Sensor
• Ultrasonic
• LDR Sensor
• None of the above

2. What is the full form of IR sensor?

• Intra resistance sensor
• intensity radio sensor
• infrared sensor
• infrasonic radio sensor

3. The number of pins on an IR sensor?

• 2 pins
• 3pins
• 4 pins
• 8 pins

4. Which battery terminal is connected to the "VCC" pin on the IR sensor?

• negative terminal
• positive terminal
• can connect any terminal of the battery
• not connected to battery terminals.

5. This activity uses an IR sensor to measure?

• Temprature
• Distance
• Thickness
• Weight

6. The terminals a buzzer has?

• Only positive
• Only negative
• VCC, GND, OUT
• Cathode and Anode

7. what will happen if we supply a voltage of 25V to the VCC of the IR Sensor?

• Sensor will work fine
• Sensor will not respond
• Sensor will damaged
• Sensor will function normally

8. Which IR sensor pin is attached to the buzzer's positive pin?

• GND Pin
• VCC Pin
• OUT Pin
• Positive Pin

9. Terminals for jumper wires are?

• both are positive
• both are negative
• one positive and other is negative
• both are neutral

10. Can the IR sensor's range be adjusted?

• Yes
• No
• Not possible in IR sensor module
• range is fixed for IR sensor