Deck 3: Electrical Fundamentals

Question 1

An electrical conductor is an element with _______ electrons in its outer orbit.

A) Less than 2
B) Less than 4
C) Exactly 4
D) More than 4

Answer 1

Electrical conductors are the elements that have less than four electrons in its outer orbit.
Copper is a brilliant conductor as it has only one electron in its external orbit.
An atomic model of conductor having one electron in its outer orbit is shown below in Figure 1:
Figure 1
The other commonly used conductors are as follows:
1) Cast iron
2) Steel
3) Aluminum
4) Gold
5) Silver
Thus, the correct option is
.

Question 2

What is electricity?

Answer 2

When an atom losses any electron, it turn out to be unstable, in this case the number of proton in an atom will be greater than number of electron. Therefore, the atom will be in unstable stage and have positive charge on it.
Also, if an atom gains more electrons it turn out to be unstable, in this case the number of electron in an atom will be greater than number of proton. Therefore, the atom will be in unstable stage and have negative charge on it.
Now, the unbalanced charged atom will try to regain its stability by having equal number of protons and electrons by exchanging electrons from the adjacent atoms.
This movement of electrons during the "equalization" process is known as electricity.

Question 3

Like charges _______.

A) Attract
B) Repel
C) Neutralize each other
D) Add

Answer 3

The positive and negative charges within an atom are similar to north and south poles of a magnet.
Charges that are identical will repel each other, analogous to the poles of a magnet.
Unlike charges attract and like charges repel each other, is shown in Figure 1:
Figure 1
Thus, the correct option is
.

Question 4

What are the ampere, volt, and ohm?

Question 5

Carbon and silicon are examples of _______.

A) Semiconductors
B) Insulators
C) Conductors
D) Photoelectric materials

Question 6

What are three examples of conductors and three examples of insulators?

Question 7

Which unit of electricity does the work in a circuit?

A) Volt
B) Ampere
C) Ohm
D) Coulomb

Question 8

What are the four sources of electricity?

Question 9

As temperature increases, _______.

A) The resistance of a conductor decreases
B) The resistance of a conductor increases
C) The resistance of a conductor remains the same
D) The voltage of the conductor decreases

Question 10

The _______ is a unit of electrical pressure.

A) Coulomb
B) Volt
C) Ampere
D) Ohm

Question 11

Technician A says that a two-wire variable resistor is called a rheostat. Technician B says that a three-wire variable resistor is called a potentiometer. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B

Question 12

Creating electricity by exerting a force on a crystal is called _______.

A) Electrochemistry
B) Piezoelectricity
C) Thermoelectricity
D) Photoelectricity

Question 13

The fact that a voltage can be created by exerting force on a crystal is used in which type of sensor?

A) Throttle position (TP)
B) Manifold absolute pressure (MAP)
C) Barometric pressure (BARO)
D) Knock sensor (KS)

Question 14

A potentiometer, a three-wire variable resistance, is used in which type of sensor?

A) Throttle position (TP)
B) Manifold absolute pressure (MAP)
C) Barometric pressure (BARO)
D) Knock sensor (KS)