Electronics Information - Electrical Systems

What is the primary difference between a rectifier and an inverter?

A rectifier converts an AC input to DC while an inverter converts a DC input to AC.

A circuit breaker is better than a fuse because _________.

A circuit breaker can be reused multiple times.

A capacitor blocks Direct Current (D.C). Hence, it is also known as _________.

Both Blocking and Coupling Capacitors.

What does the following image represent?

Rheostat.

Two 16 ohm speakers are connected in parallel to an amplifier that provides a 32 volt output. The voltage across each speaker is?

32 volts.

What should the temperature of a typical soldering iron be when joining two wires together?

500 to 600 degrees Fahrenheit.

A ground is NOT which of the following?

A place with a maximum resistance.

What color is Neutral wire?

White.

Which of the following statements is INCORRECT regarding a transformer?

Secondary current of a step-down transformer is less than its primary current.

What does the following image represent?

Diode.

In a transformer _________.

All of the answers.

Which of the following is TRUE regarding an AC signal?

The smaller the time period, the greater the frequency.

An inductor stores energy in the form of _________.

Magnetic field.

Which of the following statements about a capacitor is FALSE?

It is safe to touch a capacitor with your hands as long as it is small.

The resistor color code for 2 is _________.

Red.

What is the frequency of Direct Current (DC)?

0 Hz.

Which of the following statements are CORRECT?

I. A motor converts electrical energy into mechanical energy.

II. A generator converts mechanical energy into electrical energy.

III. A motor converts mechanical energy into electrical energy.

IV. A generator converts electrical energy into mechanical energy.

I and II

Which of the following is NOT an application of a transistor?

Transformer.

What does this symbol refer to?

Piezo transducer.

What is the basic operation of a step-up transformer?

It steps up the voltage and steps down the current.

Which function does the receiving antenna provide in radio communication?

It catches the signal out of the air.

What type of switch is shown in the given picture?

Push-to-break.

Rectification is an important application of a diode. Rectification can be defined as _________.

The conversion of AC to DC.

What is commonly used in a circuit in which the flow of electricity needs to pass easily in one direction but not the opposite direction?

Diode.

A parallel combination of two resistors is connected in series with a 4 ohm resistor. If the total effective resistance by these three resistors is 10 ohms then which of the following can be the values of two resistors in parallel connection?

One resistor is of 8 ohms and the other is of 24 ohms.

Which of the following is NOT a characteristic of a step-up transformer?

The primary voltage is higher than the secondary voltage.

Which of the following is NOT a type of resistor?

Dielectric.

Using a fuse rated higher than the required current rating of a circuit can _________.

Result in serious damage to your circuit.

What are the THREE terminals of a transistor?

Base, Emitter, Collector.

AC is an abbreviation for _________.

Alternating current.

A properly soldered connection will appear _________.

Shiny.

Which of the following statements is CORRECT regarding inductors?

An inductor blocks AC but allows DC to pass.

Which of the following is the preferred method for splicing wires?

Soldering.

Four capacitors are connected in parallel, each having a capacitance of 4 farads. What will be the equivalent capacitance of these capacitors?

16 F

Inductance is a factor in which of the following?

An AC circuit.

A resistor with a 100-ohm resistance has 10% tolerance. What does this mean?

The resistance may vary from 90 ohms to 110 ohms.

Which of the following electronic components can store a charge?

Capacitor.

If two different resistors are connected in series, then which of the following statements is CORRECT regarding the electrical power consumed by the resistors?

The resistor offering larger resistance will consume more electrical power.

A capacitor stores energy in the form of _________.

Electric Field.

An oscilloscope is typically used to analyze _________.

Complex waveforms.

In an electronic circuit, a thermocouple can be used to _________.

Open or close a circuit at a designated temperature.

Printed circuit boards are typically made out of _________.

Fiberglass.

An ideal fuse should have a _________.

Low melting point and a high current rating.

What does the following image represent?

Ground.

What type of electronic component is commonly used to store electrical energy and release it when needed in a circuit?

Capacitor.

What type of electronic component is used to measure temperature by generating a voltage proportional to the temperature difference?

Thermocouple.

What is the main difference between Direct Current (DC) and Alternating Current (AC)?

The direction of flow of electric charge.

What electronic component acts as a signal amplifier or switch in electronic circuits?

Transistor.

What type of electronic component is used to limit the flow of electric current in a circuit?

Resistor.

What electronic component allows current to flow in one direction only and blocks it in the opposite direction?

Diode.

What happens to the electrical resistance of a conductor when it is cooled to extremely low temperatures?

Electrical resistance decreases to nearly zero.

What electronic component combines multiple electronic functions onto a single chip?

Integrated Circuit.

How does a transformer work to change the voltage level of an alternating current?

By electromagnetic induction.

Which electronic components are designed to interrupt the flow of current in a circuit when it exceeds a certain limit?

I. Capacitor

II. Fuse

III. Circuit Breaker

IV. Transistor

II and III