Moving Charges and Magnetic Effects Test - 1

Lorentz Force generally refers to

A 2 MeV proton is moving perpendicular to a uniform magnetic field of 2.5 T. The force on the proton is

A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x > b, is

A straight section PQ of a circuit lies along the x–axis from x = – a/2 to x = a/2 and carries a current I. The magnetic field due to the section PQ at point x = + a will be

A conducting circular loop of radius r carries a current i. It is placed in a uniform magnetic field B such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is

A charged particle is released from rest in a region of steady and uniform electric and magnetic fields, which are parallel to each other. The particle will move in a

A power line lies along the East-West direction and carries a current of 10 A. The force per unit length due to the earth's magnetic field of 10^–4 T is