Ultrasonic have__________________? February 3, 2021 / By Preparation Point / Physics Mcqs Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedInA. frequency in the audible range B. frequency is greater than 20 kHz C. frequency lower than 20 Hz D. all of above Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn