Explanation: The temperature stability or average temperature coefficient of output voltage, is the change in the output voltage per unit change in temperature and expressed in miilivolts/oC. 11. In the circuit given below, let VEB(ON)=0.8v and ß=16. Calculate the output current coming from 7805 IC and collector current coming from transistor Q1 for a load of 5Ω.
A. IO =111mA, IC= 808mA
B. IO =111mA, IC= 829mA
C. IO =111mA, IC= 881mA
D. IO =111mA, IC= 889mA
Answer:A
Explanation: The temperature stability or average temperature coefficient of output voltage, is the change in the output voltage per unit change in temperature and expressed in miilivolts/oC. 11. In the circuit given below, let VEB(ON)=0.8v and ß=16. Calculate the output current coming from 7805 IC and collector current coming from transistor Q1 for a load of 5Ω.
A. IO =111mA, IC= 808mA B. IO =111mA, IC= 829mA C. IO =111mA, IC= 881mA D. IO =111mA, IC= 889mA
Explanation: When load = 5Ω, IL= 5v/5Ω =1A. The voltage across R1 is 7Ω × 1A=7v. Since, IL is more than 100mA, the transistor Q1 turns on and supplies the extra current required.