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

An infinite straight current carrying conductor is bent into a circle as shown in the figure . If the radius of the circle is R , the magnetic field at the centre of the coil is :

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.

A charge of 10^(-6)C is describing a circular path of radius 1cm making 5 revolution per second. The magnetic induction field at the centre of the circle is

A charge of 10^(-6)C is describing a circular path of radius 1cm making 5 revolution per second. The magnetic induction field at the centre of the circle is

In total, 10 charges (5 of them are +q each and other 5 are -q each) are placed randomly on the circumference of a circle. The radius of the circle is R. The electric potential at the center of this circle due to these charges will be

A particle moving in uniform circle makes 18 revolutions in 1 minutes. If the radius of the circle is 10 cm, the speed of the particle is

A particle moving in uniform circle makes 18 revolutions in 1 minutes. If the radius of the circle is 10 cm, the speed of the particle is