Question 43
Look at the figure below and then complete the following sentences:
If inside the coil we insert a steel rod and then the switch S is closed, electric current flows, steel rod will become a …(a)…, so it can …(b)… a small clip. When another …(c)… is put to point A or B of the steel rod, they will …(d)… or …(e)… each other. When switch S is open, it will back to the …(f)…
If inside the coil we insert a steel rod and then the switch S is closed, electric current flows, steel rod will become a …(a)…, so it can …(b)… a small clip. When another …(c)… is put to point A or B of the steel rod, they will …(d)… or …(e)… each other. When switch S is open, it will back to the …(f)…