A toy motor labelled “6 V DC only” is accidentally connected directly to the 220 V,…
PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A toy motor labelled “6 V DC only” is accidentally connected directly to the 220 V, 50 Hz household mains. Which outcome is most likely?
(a) The motor’s commutator will act like a rectifier, so it will run much faster than normal but remain undamaged
(b) The motor will not run at all because alternating current cannot flow through a DC motor, so it will stay safe
(c) The motor will vibrate violently without steady rotation and will soon be damaged
(d) The motor will keep reversing every half-cycle, but its inertia will smooth this out so it continues operating