The magnetic field strength at the north pole of a 2.0-cmcm-diameter, 8-cmcm-long Alnico magnet is 0.10 TT. To produce the same field with a solenoid of the same size, carrying a current of 2.4 AA , how many turns of wire would you need

2653 turns

Explanation:

We are given that

Diameter,d=2 cm

Length of magnet,l=8 cm=

1m=100 cm

Magnetic field,B=0.1 T

Current,I=2.4 A

We are given that

Magnetic field of solenoid and magnetic are same and size of both solenoid and magnetic are also same.

Length of solenoid=

Magnetic field of solenoid

Using the formula

Where

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

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