9-12 Topics

What will happen if we supply a voltage of 25V to the Vcc of the Ultrasonic sensor?

• Damage is caused

• Sensor will work fine

• Sensor will not respond for the time the voltage is applied

• Sensor will function normally

Basically sound waves are ______________.

• Voltage signals

• Pressure waves

• Current

• Radiation

Which of the following is not a character of a sensor of a sound wave?

• Causes no health hazard

• They are suitable in a harsh environment

• They are only suitable in cold environment

• They can be used in corrosive environment

What is the use of the Ultrasonic Sensor?

• Proximity Detection

• Humidity Detection

• Image Processing

• GPS

Electrical strain gauge works on the principle of __________

• variation of resistance

• variation of capacitance

• variation of inductance

• variation of area

Proper functioning of a strain gauge depends on __________.

• strain

• stress

• bonding

• length of wire

Electrical strain gauges measure changes in _______

• resistance, capacitance and inductance

• resistance only

• capacitance only

• inductance only

Mechanical gauges measure the _______

• change in resistance

• change in length

• change in area

• change in inductance

Tensile stress decreases the length.

• True

• False

Strain gauge has a _______a) b) c) d)

• high temperature coefficient of resistance

• low temperature coefficient of resistance

• zero temperature coefficient of resistance

• infinite temperature coefficient of resistance