2 marksElectromagnetic Induction
CAPE Physics Unit 2 · 2008 (Rest of Region) · Paper 2 · Question 4(a)
Define magnetic flux and state Lenz's law.
The mark scheme is shown once you've answered.
Practise this questionOther parts of this question
- 4(b)(i)Explain why the ring jumps into the air.[2 marks]
- 4(b)(ii)Describe and explain the motion of the ring, if any, when a slot is cut into the ring as shown in Figure 4(b).[2 marks]
- 4(c)(i)Calculate the total magnetic flux
\Phithrough the coil at timet = 0.[2 marks] - 4(c)(ii)a)Given the rate of change of flux is
2\pi f \Phi \sin(2\pi f t), find the maximum instantaneous value of the induced e.m.f. in the coil.[3 marks] - 4(c)(ii)b)Find the r.m.s. value of the e.m.f. induced in the coil.[2 marks]
- 4(c)(iii)State what difference it would make to the induced e.m.f. if the coil were fixed and the magnet rotated at the same rate and in the same direction.[2 marks]
More practice: the rest of this paper · more Electromagnetic Induction questions · all CAPE Physics Unit 2 past papers