As a metal wire is moved upwards through a magnetic field and cuts the field lines, an electromotive force (e.m.f.) is induced across the wire. Which alteration changes the size of the induced e.m.f.?
- Amoving the wire down at the same speed
- Bmoving the wire up at a faster speed
- Cusing a thicker wire
- Dusing a wire made from a different metal