Answer to Question #209369 in Physics for Nyola

Question

In Thika, the earth’s magnetic field is approximately uniform, nearly horizontal and of magnitude . A metal bar of length 1.2 m carries a current of 1.7 A. The bar is held horizontally in east – west direction. What is magnitude and direction of the magnetic force on the bar?

Answer 1

$$F=BIL\\F=(25\cdot10^{-6})(1.7)(1.2)=5.1\cdot10^{-5}\ N$$

Direction: upwards.