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WorksheetsElectrical fundamentals
Total questions: 55
Worksheet time: 2hrs 30mins
True or false : The photoconductive cell is a type of a variable resistor, which is solely temperature sensitive.
True
False
Yes
No
What is the other term for power consumption?
Power rating
Power assurance
Power conversion
Powerful
A ________________ is a device that stores electrical energy.. The energy is stored in such a way as to oppose any change in voltage.
Resistor
Capacitor
Inductor
Conductor
In a simple capacitor that consists of two metal plates, the separating insulating material is called __________?
Electrodes
Electrolytes
Bi-Electric
Dielectric
True or false: The capacitance increases as the distance between the plates decreases.This action brings the plates closer together, creating a stronger electric field.
True
False
Correct
Incorrect
This type of capacitor is also referred to as a self-healing capacitor
Paper capacitor
Ceramic capacitor
Mica capacitor
Oil capacitor
This magnetism theory assumes that all magnetic substances are composed of tiny molecular magnets.
Ohm’s Theory
Faraday’s Theory
Weber’s Theory
Domain Theory
True or false : The opposite of reluctance is permeability, permeability being the magnetic equivalent of electrical conductance.
Yes
No
True
False
__________________ is also known as magnetic potential, the property of certain substances or phenomena that gives rise to magnetic fields.
Magnetomotive force
Reluctance
Magnetic flux
Permeance
Correct or Incorrect: Lenz's law which states that "The induced EMF in any circuit is always in a direction to oppose the effect that produced it".
True
False
Correct
Incorrect
When the voltage and current sine waves cross the zero line at the same time, they are said to be ‘_________’.
Mid phase
Out phase
In phase
DC phase
What is the modern unit for frequency?
Peak
Decibels
Ampere-turn
Hertz
In the battery symbol, the short bar is positive terminal and the long bar always represents the negative terminal. True or false?
True
False
Correct
Incorrect
Current is ______________ proportional to the applied voltage.
Indirectly
Inversely
Conversely
Directly
True or false: Good conductors will have a low resistance.
True
False
Maybe
A __________ is a chemical combination of two or more elements which can be separated by chemical but not
by physical means. Has properties that are different from its component elements.
Element
Compound
Mixture
Alloy
Depending on their ability to conduct an electric current , atoms with four valence electrons ,are called ________?
conductors
insulators
semiconductors
Friction, pressure and separation are the major causes of static electricity. This process is called the Triboelectric Effect ('tribo' means _______________).
heat
contactless
Slime
rubbing
What is the main purpose of a Static discharger or also know as static wicks ?
For lightning strike
To minimize the interference on aircraft radio performance
For bird strike
For aerodynamic reason of cambering the trailing edge of the wing airfoil.
_______is a state of matter where some of gas electrons are stripped or "ionized" from their molecules or atoms.
Can be formed by high temperature, or by application of a high electric field.
Volatility
Plasma
Molecular activity
Steam
In conduction: Can electricity flow through a vacuum ?
Yes
No
It is defined as the ability to do work.
Power
Electricity
Energy
Inertia
A fundamental law of electricity is that the electron flow is directly proportional to the applied voltage. If the voltage is increased, the flow is increased. True or false?
True
False
Theoretically proven, the correct electron flow direction is ?
Positive to positive
Positive to negative
Negative to Positive
Negative to Negative
In the old times, they thought that the flow of electrons are from positive to negative . This reference flow of electron is now known as ?
Electron flow
Conventional flow
Conductional flow
Laminar flow
An electron moves approximately the speed a light (186,000 Miles per Second). True or false?
True
False
The device used to measure current is called ?
ammeter
voltmeter
ohmmeter
thermometer
What is the unit of measurement for electrical resistance?
The symbol used to represent this is the Greek letter omega .
(a)
What is the difference between a capacitor and inductor?
Which statement is incorrect about Carbon resistor
Carbon resistors are the most common resistors found because they are easy to manufacturer and inexpensive.
One other disadvantage of carbon resistors is their limited power handling capacity.
The disadvantage of carbon resistors can be overcome by the use of WIREWOUND resistors
Their prime advantage is that they have a tendency to change and deteriorate its value as they age.
What is a Short Circuit?
An accidental path of low resistance causing an abnormally high amount of current to flow.
A section of a circuit that has a complete path for current
The point where individual branch wires join the main circuit
It is when a break or an open exists in a complete conducting pathway.
True or False: In a thermocouple two similar metals with the same properties are joined at both ends to form a hot junction and a cold junction.
True
False
(a) are two or more cells that are grouped together to form the one source of electrical supply.
This electrical phenomenon happened when pressure is applied to certain crystals.
magnetic field
piezoelectric effect
induction
interference drag
1. What is the redesignated unit of conductance?
siemens (S)
voltage (V)
mho (G)
ohm (R)
Originally, what is the first unit of conductance being the opposite of resistance?
voltage (V)
siemens (S)
ohm (R)
mho (G)
True or False : When humidity is low, Lower static charges are generated.
True
False
Correct
Incorrect
________________ describes the process which takes place when an ionic solution has electricity passed through it.
Electrolytes
Electrodes
Electrolysis
The atomic number of an atom is determined by the number of (a) in its nucleus. Or simply the atomic number is also equal to its number .
What are the three sub-atomic particles or an atom ?
(a)
If matter gain an electron thus having an excess number of electron, the charge now will be ?
positive
negative
neutral
In the simple galvanic cell, the electrolyte is in a
liquid form. In the dry cell, the electrolyte is a __________ form.
water
paste
solid
plasma gas
Referring to the figure, resistors R1 = 10 ohms, R2 = 10 ohms, R3 = 50 ohms, and R4 = 30 ohms, are connected in series with a power source. The current through the circuit is 0.5 ampere. What is the total resistance?
(a)
Referring to the figure, resistors R1 = 10 ohms, R2 = 10 ohms, R3 = 50 ohms, and R4 = 30 ohms, are connected in series with a power source. The current through the circuit is 0.5 ampere. What is the battery voltage?
(a)
In a motor: What is the difference between a rotor and a stator?
The ____________ is constructed of a number of conducting bars running parallel to the axis of the motor and two conducting rings on the ends. Typically, the conductors may be copper or aluminium.
The assembly resembles a squirrel cage.
wound rotor
Squirrel-Cage Rotor
black box rotor
Some modern jet aircraft produce AC with a generator called an IDG. What does IDG stands for?
interaction drive generator
integrated drive generator
integrated drive gerotor
What is the difference between an AC and DC ?
What is the difference between a low pass filter and a high pass filter?
What is a transformer?
Impedance is the total opposition to current flow in an alternating current circuit.Abbreviation for impedance is Z. Impedance is expressed in voltage ( V) . True or false?
True
False
The____________of an AC current is the number of cycles completed in one second.
period
alternation
cycle
frequency
Explain voltage, current and resistance.
What is static electricity?
What is a valence shell?
(a)
