Question

which solid - state welding process is most likely used for bonding a plastic part to a metal contact in a small electronic device? a explosion welding b ultrasonic welding c friction stir welding d fusion welding

Explanation:

• Explosion welding uses high explosives, unsuitable for small electronics.
• Ultrasonic welding uses high-frequency vibrations to bond small, delicate parts (plastic to metal) without high heat, ideal for electronics.
• Friction stir welding is for thick metal joints, not small plastic-metal parts.
• Fusion welding melts materials, which damages sensitive electronics and plastics.

Answer:

B. ultrasonic welding