23) Which among the following acts as a switch in switching regulator?

24) How many RC stages are used in the RC phase shift oscillator?

25) In an SCR, the latching current is _____ the holding current

26) Which of the following is decade counter?

27) Assume that a 4-bit serial in /serial out shift register is initially clear. Bits are shifted in from left. We wish to store the nibble 1100. What will be the 4-bit pattern after the second clock pulse? (Right-most bit first)