0.7 V Varimas Figure 2 A characteristic curve 15) For the characteristic curve in Figure 2. the region between A and B is called the A) breakdown region C) cutoff region B) active region D) saturation region 16) For the characteristic curve in Figure 2, the equation Ic - BDCB is true A) only beyond C on the curve C) only between B and C on the curve 17) ICEO is A) collector current when the transistor is cutoff B) base current when the transistor is saturated C) collector current when the transistor is on D) collector current when the transistor is saturated 18) If a BJT is saturated. 15) 16) B) at no place on the curve D) only between A and B on the curve 17) A) both base current and collector current are at a maximum B) VCC appears between the collector and emitter C) base current is at maximum D) collector current is at maximum 19) If a BJT is saturated. 18) 19) A) VCE is approximately 1/2 VCC C) VCE is near zero B) VCE is approximately equal to VCC D) none of the above 7 of 8 Re 3.3 ΚΩ 10- le (mA) 50 mW/cm² V+24.0 V 8- 40mW/cm 6- 30 mW/cm² 4- 20 mW/cm 10 mW/cm Dark current Va(V) Figure 6 A phototransistor and its characteristic curve 35) Refer to Figure 6. Assume you measure VOUT as 11 V. From this, you can conclude that the light intensity is approximately A) 20 mW/cm2 B) 30 mW/cm² C) 40 mW/cm² 35) D) 10 mW/cm² 36) 36) The primary purpose of an optocoupler is to A) couple an LED to a relay C) isolate certain sections of circuits B) amplify light D) convert light into electrical current 37) The metal mounting tab or case of a power transistor is connected to the A) emitter B) collector 38) Small signal transistors are available in A) dual in line (DIP) packs C) quad small outline (SO) packs C) base B) plastic or metal cases D) all of the above 37) D) substrate 38)