Physics

Problem

Loop P has

50

turns and radius

4\,\text{cm}

carrying a current of

2\,\text{A}

. Loop Q has

100

turns and radius

6\,\text{cm}

. What current must flow through loop Q so that the magnetic field at its centre equals that at the centre of loop P? a)

3.0\,\text{A}

1.5\,\text{A}

0.75\,\text{A}

2.25\,\text{A}