The Motor Effect

These questions cover the motor effect skills that school trial papers test again and again: the force on a wire, its direction, wires at an angle, forces between parallel wires, three-wire problems, current balances and Newton's third law. Use $\frac{{\mu }_0}{2\pi }=2\times 10^{-7}$ N A⁻². They start easy and get harder. Stuck? Tap Show a hint for one step at a time.