DP Physics (last assessment 2024)
Question 22M.2.HL.TZ2.b.ii
| Date | May 2022 | Marks available | [Maximum mark: 2] | Reference code | 22M.2.HL.TZ2.b.ii |
| Level | HL | Paper | 2 | Time zone | TZ2 |
| Command term | Outline | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 2]
22M.2.HL.TZ2.b.ii
A fixed horizontal coil is connected to an ideal voltmeter. A bar magnet is released from rest so that it falls vertically through the coil along the central axis of the coil.
The variation with time t of the emf induced in the coil is shown.
Part of the graph is above the t-axis and part is below. Outline why the areas between the t-axis and the curve for these two parts are likely to be the same.
[2]
Markscheme
area represents the total change in flux «linkage» ✓
the change in flux is the same going in and out ✓
«when magnet is approaching» flux increases to a maximum ✓
«when magnet is receding» flux decreases to zero ✓
«so areas must be the same»
