Home
Class 12
PHYSICS
A long straight wire carries a current o...

A long straight wire carries a current of `35A`. What is the magnetic of the field `vecB` at a point `20cm` from the wire?

Text Solution

Verified by Experts

Current in the wire `I=35A` , Distance of a point from the wire `=r=20cm=0.2m`
Magnitude of the magnetic field at this point is givenn as `B=(mu_(0))/(4pi)(2I)/r`
Where `mu_(0)=` Permeability of free space `=4pixx10^(-7)TmA^(-1), B=(4pixx10^(-7)xx2xx35)/(4pixx0.2)=3.45xx10^(-5)T`
Hence, the magnitude of the magnetic field at a point 20 cm from the wire is `=3.5xx10^(-5)T`
Promotional Banner

Similar Questions

Explore conceptually related problems

A long straight wire carries a current of 35 A. What is the magnitude of the field vecB at a point 20 cm from the wire?

If a long straight wire carries a current of 40 A, then the magnitude of the field B at a point 15 cm away from the wire is

A striaight wire carries a current of 3 A calculate the magnitude of the magentic field at a point 15 cm away from the wire

A straight wire carries a current of 6A from south to north direction. What is the magnetic field due to 1cm piece of wire at a point 50cm , 30^@ east of north?

An electric current passes through a long straight copper wire. At a distance of 5 cm from the straight wire, the magnetic field is B. What is the magnetic field at a distance of 20 cm from the wire ?

A straight thick long wire of uniform cross-section of radius 5cm is carrying a steady current 5A . Calculate the magnetic field at a point 2cm from the axis of wire, well inside the wire.

An electric current passes through a long straight wire. At a distance 5 cm from the wire the magnetic field is B . The field at 20 cm from the wire would be

A long straight wire carries a current of pi amp . The magnetic field due to it will be 5xx10^(-5)"weber"//m^(2) at what distance from the wire [ mu_(0)= permeability of air]