A current of 5.0 A exists in the circuit shown in The wire PQ has a length of 50 cm the magnetic field in which it is immersed has a magnitude of 0.20 T. Find the magnetic force acting on the wire PQ.

Explanation

Magnetic force on wire PQ
` = iJB sin 90@ `
`= 5 xx 50 xx 10 ^(-2) xx 0.2 xx 1`
` 0.50N` toward inside the cricuit .