Two long, straight, parallel wires are 10.0 cm apart and carry 4.80 a currents in the same direction. part a: find the direction of the magnetic field at point p1, midway between the wires
part b: find the magnitude of the magnetic field at point p1, midway between the wires.
part c: find the direction of the magnetic field at point p2, 28.0 cm to the right of p1.
part d: find the magnitude of the magnetic field at point p2, 28.0 cm to the right of p1.

5.9 x 10⁻⁶ T

Explanation:

The direction of magnetic field is clockwise around a long current carrying wire. Its value is given by the relation

B = Kx 2 current / distance [ K is a constant having value 10⁻⁷ for air.]

At the middle point between two given wires , magnetic field due to each of the wires will be equal and opposite.So they will cancel out each other to zero. Hence resultant magnetic field at this point will be zero.

Part C : At this point , magnetic field due to each of the wires will be added up because they act in the same direction.

Magnetic field due to first wire

B₁ =

= 3.4 x 10⁻⁶ T

Magnetic field due to second wire

B₂ =  

= 2.5 X 10⁻⁶ T

Total field = ( 3.4 +2.5)x 10⁻⁶

= 5.9 x 10⁻⁶ T.

Its direction will be downwards on the plane of the paper.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

1.   what is light?

light is an electromagnetic wave visible to the human eye. 

2. what is a reflection?

the rebounding of a light ray when it hits a mirror.

3. what is the incident ray?

contacts the surface of an object.

4. what is the reflected ray?

bounces off a reflective surface.

5. what is the normal ray?

perpendicular to the surface of a mirror.

6. what is the angle of incidence?

an angle formed by the incident ray and the normal.

7. what is the angle of reflection?

an angle formed by the reflected ray and the normal.

8. what is refraction?

(bending.)

9. what is a converging lens?

bring together light rays that pass through.

10. what is a diverging lens?

spreads out light passing through.

11. focal point?

the real point where the refracted rays meet when the incident rays run parallel.

i copy pasted btw from an website..