Question

force on a charged particle is zero when projected at angle with a magnetic field
a) 0 degree
b) 90 degree
c) 60 degree
d) 270 degree​

Answer 1

Work done by magnetic field is always zero on charge particle because direction of force and displacement of particle is always perpendicular, so, F.S = 0. In magnetic field particle experiences only radial acceleration.

Answer 2

Force on a charged particle is zero when projected at an angle of 0° with the magnetic field. (Option A)

• F = qVBsinθ is the force acting on a charged particle in a magnetic field.
• If the angle formed by the velocity and magnetic field is 90 degrees, the shape will be a circle.
• It will move in a straight line if the angle is 0 degrees.
• If the angle is less than 90 degrees and higher than zero, the route is helical.
• Force on a charged particle is now zero if either velocity or angle is zero. Thus, when a charged particle is projected at a zero-degree angle with the magnetic field, the force on it is zero.
• As a consequence, option A is the correct solution.