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 of radius r metres, at n revolutions per second.The magnetic field induction at the centre of the circle will be

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.

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.

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.

An alpha particle is completing one circular round of radius 0*8m in 2 seconds. Find the magnetic field at the centre of the circle. Electronic charge =1*6xx10^(19)C .