Question

b) Identify in which of the following three cases, will the electromagnet have a greater number of paper clips attached to it, A or B. Justify your choice with proper reasons.

Case 1
Nail A - 50 turns,
Nail B - 100 turns

Case 2
Coil around Nail A - attached to single cell
Coil around Nail B - attached to two cells

Case 3
A - Pencil as the core
B - Iron nail as the core​

Answer 1

Answer:

In all 3 cases, option (b) is the answer

reason for case 1 : strength of magnet increases by increasing the number of turns

case 2 : strength increases with increase in current

case 3 : iron nail is a conductor of electricity