An electron enters a magnetic field of 1G with a speed `[2 x 10^6 ms^-1]` in a perpendicular direction. Calculate its (i) radius of path and (ii) frequency of revolution.

A proton moving with velocity (10^7) m/s to enters a magnetic field of 1.5 T making an angle 30° with the direction of the field. Find the radius of the helical path and its frequency of rotational motion

A charged particle enters a magnetic field with a velocity v in a direction perpendicular to the field. Find an expression for the radius of the circular path of the particle.

A proton enters a magnetic field of flux density 1.5Wb/m^2 with a speed of 2×10^7 m/s at angle of 30^o with the field. Find the force on the proton .

A charge particle enters a magnetic field with velocity v in a direction perpendicular to the field. Find the expression for the redius of the circular path of the particle.

What is the radius of the path of an electron moving at a speed of 10^7m//s in a magnetic field of 2xx10^(-4) T perpendicular to it? Also find out its frequency and energy.

A proton enters a uniform magnetic field of intensity 1.5 T in a direction perpendicular to the field. If the K.E. of the proton is (8.5 x 10^-25 J) , find the force acting on it.

A source of sound is movig with a speed 220 m(s)^-1 towards a stationary target.While moving,it emits a wave of frequency 1000 Hz.Some of the sound reaching the target get reflected back to the source as echo.Calculate the (i)frequency of sound as detected by the target and (ii)the frequency of echo as detected by the source?