www RB 20 ΚΩ Figure 4 Vcc +12 V Re 680 Ω PDC=200 RE 1.5 k VEE -12 V 21) Refer to Figure 4. The type of bias shown is A) dual supply base bias C) emitter-feedback bias 22) Refer to Figure 4. The emitter voltage, VE is approximately A) -6.4 V B)-5.2 V 21) B) emitter bias D) collector feedback bias 22) C) -3.8 V D) -1.4 V 23) 23) Refer to Figure 4. If you wanted to develop the equation for IE. A) write KVL around the base-emitter circuit B) write KVL through the emitter and collector and both power supplies C) assume VCE VRC: apply Ohm's law to find Ic first; then solve for IE D) Thevenize the base input circuit and apply Ohm's law 24) Refer to Figure 4. Assume you were troubleshooting and found that VE is exactly the same as VEE- The trouble could be caused by A) open RB C) shorted RC B) open RE D) any of the above 24) ww RB Vcc -12 V Rc 680 Ω Poc=200 20 ΚΩ RE 1.5 ΚΩ VEE +12 V Figure 5 (This is similar to Figure 4 but uses a pnp transistor with the same ẞ.) 25) Refer to Figure 5. The expected emitter voltage is A) the same as the npn circuit except for the sign B) the same as the collector voltage in the npn circuit except for the sign C) the same as the non circuit D) the same as the collector voltage in the npn circuit 25) 26) Refer to Figure 5. If RC is replaced with a 1.5 kc resistor, you would expect to see a large change in 26) A) VCE B) E C) VE 27) Refer to Figure 5. If the transistor is replaced with a lower ẞ one, there will be D) all of the above 22 27) A) a small decrease in /E B) a small increase in IE D) no change in IE 28) C) not change 29) B) increase C) not change C) a large change in IE 28) Refer to Figure 5. If RB is increased, VE will A) increase B) decrease 29) Refer to Figure 5. If Rg is increased, VCE will A) decrease