Easy Science Class 9 Level 2

Ultrasound is sound above which frequency?

Ultrasound किस frequency से ऊपर की sound है?

Show answer and explanation

Correct Answer

C. 20000 Hz

Explanation

Step 1: Identify the concept: this is about ultrasound. Step 2: Sound with frequency above 20000 Hz is called ultrasound. Step 3: Remember ultrasound equals above human hearing.

Step 1: concept पहचानें: यह ultrasound से जुड़ा है। Step 2: 20000 Hz से अधिक frequency वाली sound ultrasound कहलाती है। Step 3: Ultrasound equals above human hearing याद रखें।

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