The main differences between emitter and collector are doping concentration and size. The emitter is heavily doped, while the collector is lightly doped. You could try to swap them, but you'll get a very low \$H_{FE}\$, probably even less than 1.
Image Credit: Photo: Oxmoor House. SEASON: Although available year-round, eggplant is at its peak from July to October. CHOOSING: When selecting, look for eggplants with firm, glossy skin. Size and color vary widely among types, but the eggplant should feel heavy. Avoid those with wrinkled skin, soft spots, or brown patches.
Sowing Seeds. 1  Sow eggplant seeds indoors about six weeks before the climate begins to warm up. 2  The seeds germinate best at temperatures above 24 deg C (75 deg F), so keep in a warmer place inside the house. You can use bottom heat to maintain a soil temperature around 24 deg C for about 10 days.