MODULE 3

Question 1

Provision act for practice, licensure, and regulation of electrical engineers and electricians

Answer 1

Philippinee electrical code (RA7920)

Used nationally as basis for electrical safety for people, buildings, and contents.

Question 2

Sockets fitted with internal protective shutters, making it difficult for children to poke things inside it.

Answer 2

shuttered socket

Question 3

Protects the circuit from excessive current by melting if the current is high enough, opening the circuit, and stopping the current flow.

Answer 3

fuse

Question 4

Protects the circuit from current overload; functions similarly to fuses, but does not get destroyed, making this a long-term safety device.

Answer 4

circuit breaker

Question 5

to detect tiny mismatch in currents to prevent electrocution

Answer 5

ground fault circuit interrupter

Question 6

Device installed alongside plug sockets to the equipotential earthing system, ensuring all equipment is grounded at the same low potential.

Answer 6

equipotential earth point/stud

Question 7

A plug with a round prong that serves as the ground outlet for the device, connecting to the ground wire of the building.

Answer 7

three-pronged plug

Question 8

electrical safety procedures

Answer 8

• Check extension cord/wiring
• Inspect power tools
• Replace damaged insulated tools
• Don’t alter electrical plugs
• Keep extension cords inside
• Use outlet covers

Question 9

Polarized ions that causes ulceration on the affected area.

Answer 9

electrolysis

Question 10

Low-to-high powered voltages that can cause minor to serious injuries.

Answer 10

burns

Question 11

Affects the heart similarly to muscle cramps, caused by electrical overstimulation.

Answer 11

ventricular fibrillation

Question 12

Amount of charge in conductor per unit time

Answer 12

electric current

Question 13

two types of electric current?

Answer 13

-direct
-alternating

Question 14

changes direction and magnitude periodically.

Answer 14

alternating

Question 15

constant voltage and direction

Answer 15

DIrect

Question 16

Amount of current per unit of area

Answer 16

current density

Question 17

Net motion of charged particles in groups

Answer 17

drift velocity

Question 18

Property of a material to resist current

Answer 18

resistance

Question 19

Inverse of resistance, which is the property of the material to conduct electric current;

Answer 19

conductance

Question 20

Measure of a material’s electrical resistance.

Answer 20

resistivity

Question 21

have a negative temperature coefficient, giving them higher conductance as heat increases.

Answer 21

insulators

Question 22

have a positive temperature coefficient, giving them higher resistance as heat increases.

Answer 22

conductors

Question 23

Current is proportional to voltage, inversed with resistance.

Answer 23

ohm’s law

Question 24

Graph that shows the relationship between current and resistance, for determining the basic parameters of a device in a circuit.

Answer 24

I-V Curve

Question 25

demonstrate's ohm's law, with constant resistance

Answer 25

ohmic device

Question 26

A device that does not show Ohm’s law, or an Ohmic device with its maximum limit exceeded.

Answer 26

non-ohmic device

Question 27

Rate at which energy is transferred.

Answer 27

power

Question 28

Work done by the voltage source to the circuit; always constant.

Answer 28

Electromotive force (EMF)

Question 29

Resistance of a power source.

Answer 29

internal resistance

Question 30

Output voltage of a source, when internal resistance is considered.

Answer 30

terminal potential difference

Question 31

Condition concerning man and electrical equipment, which results in injuries and/or death.

Answer 31

electrical hazard

Question 32

Death due to electric shock.

Answer 32

electrocution

Question 33

At any junction in an electrical circuit, the sum of currents flowing into the junction is equal to the sum of the currents flowing out.

Answer 33

Kirchoff's current law

Question 34

The sum of voltages encountered in a complete traversal of any loop of a circuit (or mesh) is zero.

Answer 34

Kirchoff's voltage law

Question 35

A circuit with a resistor and a capacitor, which filters signals.

Answer 35

RC Circuit