CAPE Physics Unit 2 · 2007 (Specimen) · Paper 1 · Question Q12

A wire of length 0.5\text{ m} and resistance 5\ \Omega moves vertically with a velocity of 10\text{ m s}^{-1} perpendicular to a uniform magnetic field of flux density 4.0 \times 10^{-5}\text{ T}. What is the magnitude of the e.m.f. generated between the ends of the wire?

1. (A)1.0 \times 10^{-4}\text{ V}
2. (B)2.0 \times 10^{-4}\text{ V}
3. (C)4.0 \times 10^{-4}\text{ V}
4. (D)8.0 \times 10^{-4}\text{ V}