Physics

Problem

Two long solenoids A and B are wound with the same type of wire. Solenoid A has

600

turns, length

0.30\,\text{m}

and carries a current of

2.5\,\text{A}

. Solenoid B has

750

turns and length

0.50\,\text{m}

. What current must pass through solenoid B so that it produces the same magnetic field as solenoid A? a)

2.0\,\text{A}

3.3\,\text{A}

4.2\,\text{A}

1.9\,\text{A}