Question 1

If a different current limit is desired, the best option is to lower the value of the sense resistor.

Accepted Answer

Lowering the value of the sense resistor in a current sensing circuit decreases the voltage drop across it for a given current, effectively allowing for a higher current limit before the circuit reacts or limits the current.

Question 2

A device used to change AC into DC voltage is generally referred to as a ____.&#10;A) power supply&#10;B) capacitor&#10;C) transformer&#10;D) bridge

Accepted Answer

A power supply is a device that converts alternating current (AC) from the mains (power grid) into direct current (DC) which is required by many electronic devices.

Question 3

Operational amplifiers are famous for their ____.&#10;A) gain&#10;B) bias&#10;C) saturation&#10;D) capacitance

Accepted Answer

Operational amplifiers are well-known for their high gain, which allows them to amplify input signals significantly.

Question 4

If a load is connected to the output terminals of the power supply, current flows through the ____.&#10;A) parallel resistor&#10;B) parallel semiconductor&#10;C) series resistor&#10;D) series diode

Accepted Answer

When a load is connected to the output terminals of a power supply, the current flows through the series resistor, which is part of the circuit that limits or controls the current to the load.

Question 5

The simplest electronic voltage regulator is the ____.&#10;A) simple diode&#10;B) zener diode&#10;C) gunn diode&#10;D) Schockley diode

Accepted Answer

The simplest electronic voltage regulator is the zener diode, which is specifically designed to operate in the reverse breakdown region, providing a stable reference voltage.

Question 6

Power supplies range in complexity from a simple half-wave rectifier to a unit that is voltage regulated, current limited, and temperature protected.

Accepted Answer

Power supplies can vary significantly in complexity, from basic designs like a simple half-wave rectifier, which only converts AC to DC, to more sophisticated units that include features such as voltage regulation, current limiting, and temperature protection to ensure stable and safe operation.

Question 7

A(n) ____ must be used to provide a constant output voltage.&#10;A) capacitor&#10;B) rectifier&#10;C) inverter&#10;D) regulator

Accepted Answer

A regulator is designed to automatically maintain a constant voltage level, ensuring that the output voltage remains steady despite variations in input voltage or load conditions.

Question 8

Many of the circuits used in industry are not sensitive to a change in voltage.

Accepted Answer

Most industrial circuits are sensitive to voltage changes as they can affect the performance, efficiency, and safety of the equipment. Voltage fluctuations can lead to malfunctions, reduced lifespan of components, or even hazardous situations.

Question 9

The short-circuit protection circuit is very complex to construct.

Accepted Answer

Short-circuit protection circuits can range from simple to complex designs depending on the application, but basic short-circuit protection can be achieved with relatively simple circuitry, such as fuses, circuit breakers, or basic electronic components.

Question 10

Shunt regulators require the use of a series resistor, Rs.

Accepted Answer

Shunt regulators work by shunting excess current away from the load to regulate output voltage, and they require a series resistor (Rs) to limit the current through the shunt regulator and help in dissipating excess power.

Deck 41: Voltage Regulators