Question 17N.2.HL.TZ0.2c
| Date | November 2017 | Marks available | [Maximum mark: 3] | Reference code | 17N.2.HL.TZ0.2c |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Explain | Question number | c | Adapted from | N/A |
There is a proposal to power a space satellite X as it orbits the Earth. In this model, X is connected by an electronically-conducting cable to another smaller satellite Y.
The cable between the satellites cuts the magnetic field lines of the Earth at right angles.
Explain why satellite X becomes positively charged.
[3]
cable is a conductor and contains electrons
electrons/charges experience a force when moving in a magnetic field
use of a suitable hand rule to show that satellite Y becomes negative «so X becomes positive»
Alternative 2
cable is a conductor
so current will flow by induction flow when it moves through a B field
use of a suitable hand rule to show current to right so «X becomes positive»
Marks should be awarded from either one alternative or the other.
Do not allow discussion of positive charges moving towards X
