Questions in Moving Charges and Magnetism

Select	Question
	If an electron is going in the direction of magnetic field $\vec B $ with the velocity of $\vec {v\,} $ then the force on electron is
	One proton beam enters a magnetic field of ${10^{ - 4}}$T normally, Specific charge = ${10^{11}}\,C/kg.$ velocity = ${10^7}\,m/s$. What is the radius of the circle described by it
	In a cyclotron, the angular frequency of a charged particle is independent of
	A charged particle is moving in a uniform magnetic field in a circular path. Radius of circular path is R. When energy of particle is doubled, then new radius will be
	The radius of curvature of the path of a charged particle moving in a static uniform magnetic field is
	A proton moving with a velocity, $2.5 \times {10^7}m/s$, enters a magnetic field of intensity 2.5T making an angle ${30^o}$ with the magnetic field. The force on the proton is
	Maximum kinetic energy of the positive ion in the cyclotron is
	A charge q is moving in a magnetic field then the magnetic force does not depend upon
	An electron is travelling in east direction and a magnetic field is applied in upward direction then electron will deflect in
	A charge of 1C is moving in a magnetic field of 0.5Tesla with a velocity of 10m/sec Perpendicular to the field. Force experienced is