The arcing contacts in a circuit breaker are made of
A. Copper tungsten alloy
B. porcelain
C. electrolytic copper
D. aluminum alloy
Answer:A
The arcing contacts in a circuit breaker are made of
A. Copper tungsten alloy B. porcelain C. electrolytic copper D. aluminum alloy
Explanation: In a circuit breaker, the main contacts are usually made up of copper and conduct current in closed positions.