Question

An overhead power transmission line carries a current from East to west direction. then magnetic field at point 1.5 m north of the line is in

Answer 1

Given that,

Distance = 1.5 m  in north

Suppose, Current = 50 A

The current is flowing from East to West.  

We need to calculate the magnetic field at point 1.5 m north

Using formula of magnetic field

$B=\dfrac{\mu_{0}I}{4\pi r}$

Where, I = current

r = distance

Put the value into the formula

$B=\dfrac{4\pi\times10^{-7}\times50}{2\pi\times1.5}$

$B=0.0000066\ T$

$B=6.6\times10^{-6}\ T$

So, The according to Maxwell’s right hand thumb rule, the direction of the magnetic field is towards the North.

Hence, The magnetic field is $6.6\times10^{-6}\ T$.

The magnetic field of the line is in north direction.

Answer 2

Answer:

Vertically downward direction (inside the plane of paper)

Explanation:

Current is flowing from the direction of east to west so, by applying right hand thumb rule at a point in north direction the net tangent at that point will be downward↓