Regulators

In an unregulated power supply, if load current increases, the output voltage ...........

• remains the same

• decreases

• increases

In an unregulated power supply, if input a.c. voltage increases, the output voltage ...........

• increases

• decreases

• remains the same

Commercial power supplies have voltage regulation ...........

• of 10%

• of 15%

• of 25%

• within 1 %

A zener diode utilises ........... characteristic for voltage regulation.

• forward

• reverse

• both forward and reverse

A zener diode is used as a ............ voltage regulating device.

• series

• shunt

• series-shunt

For increasing the voltage rating, zeners are connected in............

• parallel

• series

• series-parallel

Two basic categories of voltage regulators are .......

• ceramic and electrolytic

• amplifying and switching

• linear and switching

• linear and non-linear

A zener voltage regulator is used for ............ load currents.

• high

• very high

• moderate

• small

A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?

• 3.09%

• 3.9%

• 2.87%

• 5.72%

A power supply has a voltage regulation of1 %. If the no-load voltage is 20 V, what is the full-load voltage?

• 17.2 V

• 18.6 V

• 15.7 V

• 20.8 V