Which among the following act as a switch in switching regulator?

Question

Question

This question was previously asked in

VSSC (ISRO) Technician B: Electronic Mechanic Previous Year Paper (Held on 10 Dec 2017)

Answer 1

A transistor is connected as a power switch and is operated in the saturated mode.

Thus, the pulse generator output alternatively turns the switch ON and OFF in the switching regulators.

F1 Neha Madhu 10.10.20 D6

26 June 1

Differences between Transistor and Relay are as follows:

Specific-ations	Relay	Transistor
Power supply	It can work with AC and DC	It can work with DC only.
Temperature	The relay can operate at extreme temperatures	Transistors can operate up to 95°C and a little below 0°C.
Speed of operation	Relay is much slower and operates at 200 Hz speed	Transistors can operate at MHz speed.
Wear out	It has a much shorter mechanical wear out contact life	Transistor switches almost never wear out.
Application	It can be used only to open and close circuits	Transistors can amplify analog signals as well as function as a switch.