Give definition of magnetic field and give its unit.

Explanation

1. Magnitude of force on electric charge in magnetic field is given by,
`F=Bqvsintheta`
`thereforeB=F/(qvsintheta)`
2. The magnitude of magnetic field B is 1 SI unit, when the force acting on a unit charge (1C), moving perpendicular to B with a speed 1 m/s in one newton.
3. SI unit :
Unit of B = `("Unit of F")/(qvsintheta)`
= `(1N)/(1Cxx1ms^(-1)xx1)=(1N)/(1Cs^(-1)xx1m)`
= `1NsC^(-1)m^(-1)` is also called Tesla
= `1N/(AM)`
= `1NA^(-1)m^(-1)` = 1 Tesla
Gauss is the smaller unit of magnetic field.
1 gauss = `10^(-4)` Tesla
Tesla is denoted by T.