Which factor has the greatest effect on the strength of an electromagnet? A. The position of the ammeter in the circuit
B. The distance between the battery and the electromagnet
C. The type of insulation that covers the wire
D. The number of coils of wire around the core

The number of coils of wire around the core

Explanation:

A P E X approved✅

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.