Answer to Question #82377 in Electric Circuits for Rafsan Abedin

Question

A long straight wire carries a current of 15 amps.What is the direction of the magnetic fields produced at 4 cm above the wire

Answer 1

The direction of the magnetic fields produced at 4 cm above the wire determined by the right hand rule

Right hand rule:

If you place the thumb of the right hand in the direction of the current, the direction of the circumference of the conductor with four fingers will show the direction of the magnetic induction lines

B=(μ_0·I)/2πr=(4π·〖10〗^(-7)·15)/(2π·0.04)=7.5·〖10〗^(-5) T