Ohm's Law - Technical MCQs

Q1:

Power supplies are regulated to prevent the output voltage from changing due to changes in the

A line voltage

B supply load

C frequency

D both line voltage and supply load

ANS:D - both line voltage and supply load

A regulated power supply is an embedded circuit; it converts unregulated AC into a constant DC. With the help of a rectifier it converts AC supply into DC.

Its function is to supply a stable voltage (or less often current), to a circuit or device that must be operated within certain power supply limits.