1. A wire carries a current of 10 amps. A researcher finds that the strength of the induced magnetic field at a certain point is 0.50 G. What will the strength of the induced field be at the same point if the current is increased to 25 amps? (G is gauss) A. 0.20 G B. 0.65 G C. 1.00 G D. 1.25 G

Question

1. A wire carries a current of 10 amps. A researcher finds that the strength of the induced magnetic field at a certain point is 0.50 G. What will the strength of the induced field be at the same point if the current is increased to 25 amps? (G is gauss) A.		 0.20 G B.		 0.65 G C.		 1.00 G D.		 1.25 G

anonymous · Answer

The magnetic field strength at a point is directly proportional to the current. (From $$B=\mu \times i \div 2\Pi l$$
So, 1.25 is the answer.