10. 如圖【23】所示電路,為矽質電晶體電路;若β = 100,RC = 1kΩ,R1 = 10kΩ,R2 = 15kΩ, VCC = 10V,VC = 5V時,IC為__________ mA
四、請參考圖例,以中文回答下列問題: