Digital Sensors Electrostatics

Which one of these is a use of LDR

• Tubelight

• Street lights

• Fan

• Sun

Capacitive touch in devices uses the pressure we apply for them to function

• True

• False

Digital sensors help to __________

• Store charge and release it when required

• Observe things clearer

• Produce charge

Which sensor is used when parking cars to judge distance?

• Distance

• Proximity

• Pressure

• Movement

This sensor is used for burglar alarms

• Temperature

• Humidity

• Movement/Motion

• PH

Type of sensor used to detect both metallic and non-metallic objects

• Capacitive sensors

• Inductive sensors

• Thermocouple sensors

• None of the above

Two like charges

•  neutralize each other.
• repel each other. 
• must be neutrons. 
• attract each other.

Which of the following DOES NOT use electrostatics to work?

• Digital sensors

• Electric Motor

• Photocopier

• Van de Graff Generator

What kind of charge does static electricity produce

• Positive

• Permanent charge

• Negative

• Temporary charge

DO YOU HAVE ANY DOUBTS?

• y e s

• n o

• m a y b e

• o k a y b y e.