Question

Mohit made an electromagnet ‘A’ by coiling 50 turns of wire over an iron nail. Rani also made an electromagnet ‘B’ by coiling 100 turns over a similar iron nail. Which electromagnet will attract more pins?

Answer 1

Answer:

BOTH WILL ATTRACT SAME NUMBER OF IRON NAILS ..

Answer 2

Answer:

magnetic field = u.nI

here n = No. turns/length

Therefore, Rani's electromagnet will attract more pins