A wire carries a current of 0.86 A. This wire makes an angle of 70° with respect to a magnetic field of magnitude 5.8 × 10-5 T. The wire experiences a magnetic force of magnitude 8.5 × 10-5 N. What is the length of the wire?

The length of wire is 4.68 m

Explanation:

From the question

Current in wire ; I = 0.86 A

Angle ;

Magnetic Field ;

Magnetic force ;

Let length of wire be L,

Now , the formula for force is

rearranged as

Insert the values

So the length of wire is 4.68 m

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it