The flux linkage through a coil changes by 0.60 Wb turns in 0.20 s. The average emf is:
From Paper 2: Scientific literacy in physics
1(a)4 marks
Explain how a transformer changes the size of an alternating voltage, and why its core is made of laminated iron.
From Paper 2: Scientific literacy in physics
1(b)4 marks
A 500-turn coil of area 2.0 × 10⁻³ m² rotates at 25 revolutions per second in a 0.15 T field. Calculate the maximum flux linkage and the peak emf.
From Paper 2: Scientific literacy in physics
1(c)3 marks
Explain why motors and transformers use iron cores with short, wide magnetic paths.
Score 0 / 12 · 0 of 4 marked
This paper is written by Plasmo in the style of the OCR A-Level Physics exam. It is not a past paper and is not produced or endorsed by the exam board.