A coil with 600 turns is placed in a uniform magnetic field. The average cross-sectional area of the coil is 4.0 × 10-4 m2. The magnetic flux through the plane of the coil is reduced from 2.0×10−4 Wb2.0 \times 10^{-4} \text{ Wb}2.0×10−4 Wb to zero in a time ttt. The average electromotive force (e.m.f.) induced across the ends of the coil is 1.5 V.
What is the value of ttt?
3.2×10−5 s3.2 \times 10^{-5} \text{ s}3.2×10−5 s
1.3×10−4 s1.3 \times 10^{-4} \text{ s}1.3×10−4 s
0.080 s0.080 \text{ s}0.080 s
12.5 s12.5 \text{ s}12.5 s
34 exam-style questions on OCR A A Level Physics Electromagnetism, covering Magnetic fields, Motion of charged particles, and Electromagnetism. Each one has a worked solution and a mark scheme showing where the marks go.