Question 1

Technician A says an atom that loses or gains one electron is balanced. Technician B says an atom that loses or gains one electron becomes a charged particle or ion. Who is correct?

Accepted Answer

Technician B is correct because when an atom loses or gains an electron, it becomes positively or negatively charged, respectively, thus becoming an ion. An atom is considered balanced when it has an equal number of protons and electrons, so losing or gaining an electron disrupts this balance.

Question 2

A taillight bulb is glowing dimly. A voltmeter placed across the bulb reads 4 volts. Technician A says there may be excessive resistance in the ground circuit. Technician B says there may be excessive resistance in the power feed circuit. Who is correct?

Accepted Answer

Both Technician A and Technician B are correct because excessive resistance in either the ground circuit or the power feed circuit can cause a reduction in voltage reaching the bulb, resulting in it glowing dimly.

Question 3

An H-gate is used by a computer to reverse current flow in a load component that it controls.  What does an H-gate consist of?

Accepted Answer

An H-gate consists of two pairs of transistors. It is designed to control the direction of current flow through a load, allowing for the reversal of current direction, which is essential in applications like motor control.

Question 4

Technician A says amperage is the same at any point in a series circuit. Technician B says the total resistance is the sum of all resistance in a series circuit. Who is correct?

Accepted Answer

Both statements are correct. In a series circuit, the current (amperage) is the same at any point, and the total resistance is indeed the sum of all individual resistances.

Question 5

Which device is represented by the symbol in Figure 2 above ?

Accepted Answer

The answer of  Which device is represented by the...

Question 6

Which condition could cause a circuit's fuse to burn open due to excessive current flow?

Accepted Answer

A shorted winding within a load component can cause excessive current flow, leading to a fuse burning open.

Question 7

Technician A says that a diode is an electrical one-way check valve with no moving parts. Technician B says that a transistor is an electronic switch with no moving parts. Who is correct?

Accepted Answer

Both statements are correct. A diode indeed acts as a one-way check valve for electricity, allowing current to flow in one direction but not the other, and it has no moving parts. A transistor functions as an electronic switch or amplifier and also has no moving parts.

Question 8

All of the following are digital pulse trains EXCEPT:

Accepted Answer

Continuous time-signal is not a digital pulse train because it is not discrete in time.

Question 9

The three essential parts of an operating circuit include all of the following EXCEPT the:

Accepted Answer

A switch is not an essential part of an operating circuit; it is a control device. The essential parts include a voltage source to provide power, circuitry to connect components, and a load component to use the power.

Question 10

Which of the statements concerning parallel circuits is NOT true?

Accepted Answer

In a parallel circuit, the voltage drop across each leg is the same and equals the total voltage, not the combined voltage drop of all legs.

Question 11

Which substance is an example of an insulator?

Accepted Answer

Ceramic is an insulator because it does not conduct electricity well, unlike copper, silicon, and germanium, which are conductors or semiconductors.

Question 12

If a battery with 12 volts was connected to a series circuit that had a total resistance of 3 ohms, how much current would flow in the circuit?

Accepted Answer

Using Ohm's Law (V = IR), where V is voltage, I is current, and R is resistance, we can calculate the current (I) by rearranging the formula to I = V/R. Substituting the given values, I = 12 volts / 3 ohms = 4 amps.

Question 13

Which statement concerning series circuits is NOT true?

Accepted Answer

In a series circuit, the total resistance is the sum of all individual resistances, not equal to the lowest resistance. Each resistor adds to the total resistance, making the total resistance higher than any individual resistance in the circuit.

Question 14

Technician A says diodes are used to rectify the voltage produced from an AC generator. Technician B says a zener diode is designed to protect circuit components from voltage spikes. Who is correct?

Accepted Answer

The answer of Technician A says diodes are used to...

Question 15

Technician A says that voltage drop occurs in a circuit only when the circuit is complete and current is flowing. Technician B says that amperage is reduced as it passes through a series circuit. Who is correct?

Accepted Answer

Technician A is correct because voltage drop indeed occurs in a circuit only when the circuit is complete and current is flowing. Technician B is incorrect because amperage (current) remains the same throughout all components in a series circuit; it does not reduce as it passes through.

Question 16

If a digital sensor sends the computer a variable digital frequency, what unit of measurement is applicable to the sensor's signal?

Accepted Answer

The correct unit of measurement for a variable digital frequency signal is Hertz (Hz), which measures the frequency of the signal or how often the signal cycles per second.

Question 17

Technician A says current will increase with a decrease in resistance. Technician B says current will decrease with an increase in resistance. Who is correct?

Accepted Answer

Both statements are correct according to Ohm's Law, which states that current is inversely proportional to resistance.

Question 18

A diode is used for all of the following EXCEPT :

Accepted Answer

Diodes are not typically used for switching a load device on and off; this is usually done by transistors or relays. Diodes are primarily used for rectification, controlling current flow, and voltage spike suppression.

Question 19

A circuit has two 10 ohm resistors in parallel. What is the total circuit resistance?

Accepted Answer

When two resistors are in parallel, the total resistance is less than the smallest individual resistance. The formula for total resistance $R_{total}$ in parallel is $\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2}$, which for two 10 ohm resistors gives $R_{total} = 5$ ohms.

Question 20

Technician A says when a magnetic field is moved across a conductor, voltage will be induced in the conductor. Technician B says when a conductor is moved across a magnetic field, voltage will be induced in the conductor. Who is correct?

Accepted Answer

Both statements are correct as they describe the principle of electromagnetic induction, where moving a magnetic field relative to a conductor or moving a conductor through a magnetic field induces voltage.

Quiz 1: A Review of Electricity and Electronics