Answer: question 1 is b I believe
Explanation:
every action has an opposite reaction
Miniature circuit breakers is called the developed form of fuse because MCBs are more sensitive to current than fuses. They immediately detect any abnormality and switch off the electrical circuit automatically. This prevents any permanent damage to electrical appliances and human beings
Answer:
Just 3
Explanation:
I believe the other two are incorrect
It shows the ray passing through the boundary.