List of top Physics Questions on Magnetic Effects of Current and Magnetism asked in TS EAMCET

Two long straight parallel wires P and Q carrying currents of 10 A and 20 A respectively in the same direction are placed in air with a separation of 10 cm between them. Another long straight wire R carrying a current of 5 A in the opposite direction is placed between the wires P and Q and parallel to them at a distance of 5 cm from wire Q. Then the magnitude of the net force acting on wire R per unit length is

The mean radius of a Rowland ring is 12 cm and it has 3000 turns of wire wound on its ferromagnetic core of relative permeability 500. If the magnetic field inside the core is 5 T, then the magnetizing current is

The magnetic field required to accelerate deuterons in a cyclotron operated at a frequency of 28 MHz is (Mass of proton $=1.67\times10^{-27}kg$)

The strongest force among the following forces in nature is