An electron makes (`3 xx 10^5)` revolutions per second in a circle of radius 0.5 angstrom. Find the magnetic field B at the centre of the circle.

A point charge 3.2 xx 10^(-19) C " makes " 7 xx 10^(15) revolutions per second in a circular path of radius 1 Å . Calculate the magnetic induction at the centre of the circular path.

In a hydrogen atom the electron is making 4 xx 10^(7) revolution per minute in a path of radius 0.5 A^(@) . Find the magnetic field produced at the centre of orbit.

In a hydrogen atom the electron is making 4 xx 10^(7) revolution per minute in a path of radius 0.5 A^(@) . Find the magnetic field produced at the centre of orbit.

In hydrozen atom, the electron is making 6.6xx10^(15) revolution per second in a circular path of radius 0.53A^@ . What is the magnetic induction produced at the centre of the orbit?

A helium nucleus makes full rotation in a circle of radius 0.8 m in 2.5 seconds. The value of magnetic field B at the centre of the circle will be

A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be

A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be

A charge q coulomb moves in a circle at n revolution per second and the radius of the circle is r metre. Then magnetic feild at the centre of the circle is