1.

What is the minimum frequency used in ultrasonic welding?(a) 10,000 Hz(b) 20,000 Hz(c) 30,000 Hz(d) 40,000 Hz

Answer» Right option is (b) 20,000 Hz

The best explanation: The process of ultrasonic welding is mainly used for the joining of similar metals or dissimilar metals using vibration energy, by way of high frequency. The minimum frequency needed for this purpose is 20,000 Hz.


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