19) What is the use of an emitter follower circuit?

20) Given, 1/3 + 1/4 + x = 7/12. What is the value of x ?

21) How many select inputs are required for a 8:1 multiplexer?

22) Which among the following are the advantages of Solid state relay over electromechanical relay? A) Faster switching B) Galvanic Isolation C) Bounceless Operation D) Small size

23) Convert the decimal number 110 to hexadecimal format