Ch 2 L 1 - Magnetic flux & magnetic field of stright wire

Consider an electric current passing through two straight wires X and Y that are placed in the same medium. The graph below shows how the magnetic flux density 𝐵 at a point P changes due to the current in each wire. Which of the following statements is correct?

• The distance between wire X and point P is smaller than the distance between wire Y and point P.

• The distance between wire X and point P is equal than the distance between wire Y and point P.

• The distance between wire X and point P is larger than the distance between wire Y and point P.

• The distance between the wires and point P depends on the magnetic permeability of the medium

• 8.3cm

• 75cm

• 50cm

• 12cm

An electric current flow throgh a wire which is placed into the page so the correct represntation of magntic field at point A is .......

• A

• B

• C

• D

• 5/3

• 3/5

• 6/5

• 1/1

In the following figure by displacing wire N by 3cm towards point X, the total magntic flux ........

• Increases

• Decreases

• unchanged

• vanishes

In the following figure by displacing wire N by 5cm towards point X, the total magnetic flux ........

• Increases

• Decreases

• unchanged

• vanishes

Two parallel wires carring an electric current as shown, if the neutral point is at 4cm from wire X so the distance d is ....... cm

• 8

• 12

• 24

• 30

• 30

• 45

• 60

• 90