List of top Physics Questions on Magnetic Field asked in KEAM

If the radius of the dees of cyclotron is \(r\), then the kinetic energy of a proton of mass \(m\) accelerated by the cyclotron at an oscillating frequency \(\nu\) is

The magnitude of the magnetic field inside a long solenoid is increased by

A charged particle moving with veiocity $4 \times 10^6ms^{-1} $ enters perpendicuiar to a magnetic field $B=2 \, Wbm^{-2}.$ It moves in a circular path of radius 2 cm, then charge per unit mass is

The oscillating frequency of a cyclotron is $ 10 \,MHz $ . If the radius of its Dees is $ 0.5 \,m $ , the kinetic energy of a proton, which is accelerated by the cyclotron is

An electron revolves in a circle of radius $0.4 \mathring{A}$ with a speed of $10^5 ms^{-1}. $ The magnitude of the magnetic field, produced at the centre of the circular path due to the motion of the electron, in $Wb \, \, m^{-2} $ is