�ݺ�ߣ

1. The document describes how a transistor can be used as a switch to turn electrical components like LEDs on and off. It explains the transistor's basic operation in the on and off states when varying the base current and resistance. 2. Experiments are presented to analyze the transistor's switching behavior using an LED, signal generator, and oscilloscope. The transistor's beta is calculated from measurements taken with a decade resistance box. 3. The transistor is used to switch an LED in response to DC and AC input signals. An oscilloscope shows the transistor output voltage switching between 0V and 12V depending on the base signal from the generator.Read less