A parcel-sorting machine uses four electromagnetic controls. In each control, a current-carrying conductor lies at right angles to a magnetic field. Each direction is described as if the control were set out flat on the page: 'upwards' means towards the top of the page, and 'into the page' means away from the reader.
| Control | Directions recorded | Direction to determine |
|---|---|---|
| Gate latch | Current: out of the page; field: upwards | Force |
| Scanner carriage | Field: into the page; force: upwards | Current |
| Diverter flap | Current: to the left; force: into the page | Field |
| Reject arm | Current: downwards; field: to the left | Force |
Determine the missing direction for each control in the table.