Which sensor operates based on sound wave reflection

MCQ Answer

Which sensor operates based on sound wave reflection?

कौन सा सेंसर ध्वनि तरंगों के परावर्तन के आधार पर कार्य करता है?

Topic : Sensors, Actuators and Microcontrollers

A. LDR

B. Ultrasonic Sensor

C. IR Sensor

D. Gas Sensor

Correct Answer is :

B. Ultrasonic Sensor