Question

The magnetic field due to a long straight wire has been derived in terms of µ, i and d. Express this in terms of ε0, c, i and d.

Answer 1

Explanation:

Due to a straight and long wire, the magnetic field is shown as  

B = μoi2πd

Therefore, the speed of light, c = $1 \mathrm{V} \mu \mathrm{O} \varepsilon \mathrm{O}$

⇒μo = 1c2εo

⇒B = i2πc2εod

(In terms of c, ε0, i and d)

• The simplest example for moving the charge is a long straight wire carrying the charge that creates a magnetic field.
• The magnetic field’s direction because of the moving charges will depend on the rule of right hand.
• The magnetic field lines cover the wire for the long straight wire case, which carries the current i.