Changing the conception of a magnetic field around the solenoid. (N=46)
| Analysis criteria | Details analysis criteria | Number of students (%) | Increase/Decrease(%p) | ||
|---|---|---|---|---|---|
| Pre | Post | ||||
| Direction(N→S) | Scientific | Direction (N→S) | 8(17.4) | 17(37.0) | +9(+19.6) |
| Non-scientific | No arrow | 6(13.0) | 5(10.9) | -1(-2.1) | |
| Opposite direction | 8(17.4) | 6(13.0) | -2(-4.4) | ||
| No answer | 24(52.2) | 18(39.1) | -6(-13.1) | ||
| Subtotal | 46(100.0) | 46(100.0) | |||
| Shape (Independent closed curve) | Scientific | Circular closed curve | 16(34.7) | 21(45.7) | +5(+11.0) |
| Non-scientific | Opened curve or spiral | 6(13.0) | 7(15.2) | +1(+2.2) | |
| No answer | 24(52.2) | 18(39.1) | -6(-13.1) | ||
| Subtotal | 46(100.0) | 46(100.0) | |||
| Number of magnetic field lines | Scientific | Two or more circles | 13(28.2) | 22(47.8) | +9(+19.6) |
| Non-scientific | Single circle | 9(19.6) | 6(13.0) | -3(-6.6) | |
| No answer | 24(52.2) | 18(39.1) | -6(-13.1) | ||
| Subtotal | 46(100.0) | 46(100.0) |