Induced e.m.f. · CSEC Physics

30 past-paper questions on Induced e.m.f., part of Electricity and Magnetism, from every CSEC Physics paper on Quelpr.

1. 4(a)(i)4 marks· CSEC Physics · 1992 · Paper 2Write in the name of the components labelled A, B, C and D on the dotted lines provided.
2. 4(a)(iv)1 mark· CSEC Physics · 1992 · Paper 2If the number of turns of wire on the coil is increased, with no other change, state the effect, if any, on the frequency of the output current.
3. 4(a)(v)1 mark· CSEC Physics · 1992 · Paper 2If the number of turns of wire on the coil is increased, with no other change, state the effect, if any, on the peak value of the output current.
4. 4(a)(vi)1 mark· CSEC Physics · 1992 · Paper 2If instead of increasing the number of turns of wire, the speed of rotation of the coil is increased with no other change, state the effect, if any, on the frequency of the output current.
5. 4(a)(vii)1 mark· CSEC Physics · 1992 · Paper 2If instead of increasing the number of turns of wire, the speed of rotation of the coil is increased with no other change, state the effect, if any, on the peak value of the output current.
6. 4(a)(i)2 marks· CSEC Physics · 1995 · Paper 2The wire is moved up and down.
7. 4(a)(ii)1 mark· CSEC Physics · 1995 · Paper 2The wire is moved up and down faster.
8. 4(a)(iii)1 mark· CSEC Physics · 1995 · Paper 2The wire is moved from pole to pole horizontally.
9. 4(a)(iv)1 mark· CSEC Physics · 1995 · Paper 2The magnet poles are moved up and down with the wire stationary.
10. 4(b)(i)1 mark· CSEC Physics · 1995 · Paper 2is closed
11. 4(b)(ii)1 mark· CSEC Physics · 1995 · Paper 2remains closed
12. 4(b)(iii)1 mark· CSEC Physics · 1995 · Paper 2is opened.
13. 5(c)(ii)1 mark· CSEC Physics · 2021 · Paper 2State the effect this will have on the value of the output voltage.
14. 1(c)(i)2 marks· Physics Q1 1(c)(i)Draw on Figure 1 the direction of the induced current and the direction of the arrow on the galvanometer as a result of this motion.
15. 1(c)(ii)2 marks· Physics Q1 1(c)(ii)Explain why an induced current is produced.
16. 1(c)(iii)1 mark· Physics Q1 1(c)(iii)Why is it necessary to use a sensitive galvanometer?
17. 1(c)(iv)1 mark· Physics Q1 1(c)(iv)Show on Figure 2 the direction of the induced current as a result of this motion.
18. 1(c)(v)3 marks· Physics Q1 1(c)(v)State THREE changes or adjustments that Kevin could make in this experiment to increase the induced e.m.f.
19. 1(c)(vi)1 mark· Physics Q1 1(c)(vi)Describe what will happen if the magnet remains stationary in the coil.
20. 1(d)(i)1 mark· Physics Q1 1(d)(i)Draw on Figure 3 the direction of the induced current if the coil rotates in a clockwise direction.
21. 4(a)(i)4 marks· Physics Q4 4(a)(i)Write the name of the components labelled A, B, C and x.
22. 4(a)(ii)2 marks· Physics Q4 4(a)(ii)Explain why a voltage is obtained across the terminals x and y.
23. 4(b)(iii)b)1 mark· Physics Q4 4(b)(iii)b)The speed of rotation of component A is tripled with no other change involved. Determine the effect on the peak value of the output current.
24. 4(c)(i)2 marks· Physics Q4 4(c)(i)Describe what would be observed on the galvanometer when the switch is closed.
25. 4(c)(ii)3 marks· Physics Q4 4(c)(ii)Explain your answer.
26. 4(c)(iii)2 marks· Physics Q4 4(c)(iii)Describe what would be observed on the galvanometer if the switch is subsequently opened.
27. 5(a)6 marks· Physics Q5 5(a)With the aid of at least one diagram, describe how the magnitude of the electromotive force (e.m.f.) induced in a conductor depends on the rate of change of magnetic flux that the conductor experiences.
28. 5(b)(i)3 marks· Physics Q5 5(b)(i)In the charging lane cars are required to keep moving. Why should this be so?
29. 5(b)(i)5 marks· Physics Q5 5(b)(i)How is the electromotive force (e.m.f.) generated in the stationary coil?
30. 5(b)(ii)3 marks· Physics Q5 5(b)(ii)Assuming the magnetic field is constant, state with reason, how the speed of the car will affect the charging of the batteries.