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Test your basic knowledge |
Basic Electricity Vocab
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Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)
Ohmmeter
Free Electrons
Lagging Current
Magnetic Pole
2. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.
Coulomb
Current
Series - Parallel Circuit
Voltmeter
3. A complete path provided for the flow of electrons. Consists of a source - with a closed conducting path leading from the source and back to the source
Resistance
Resistance
Electrical Circuit
Shells
4. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.
Permeability
Static Electrical Charge
Power
Factors governing the Value of EMF of a Generator
5. The dissimilar metals which are placed in an electrolyte to form a cell.
Electrode
Armature
Magnetism
Magnetic Material
6. A material with few free electrons. A structure or material used to prevent the passage of current.
Ohm's Law
Insulator
Step-Up Transformer
Ohmmeter
7. A rod or strip composed of two metals having different rates or coefficients of expansion. Upon being heated - it bends in a direction which causes the material with the greater rate of expansion to be on the outside.
Bimetallic Strip
Watt
Micro Ampere
Electron
8. A generator that produces alternating current.
Alternator
Current
Milliampere
Parallel Circuit
9. A rate of movement of electrons through a conductor.
Ampere
Current
Natural Magnet
Permanent Magnet
10. A resistor designed so that its resistance is readily adjusted.
Magnetic Field
Magnetic Material
Rheostat
Magnetic Poles
11. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.
Primary Winding
Volt
Free Electrons
Positive Plate
12. The unit of electromotive force - potential - pressure - or voltage which produces a current of one ampere in a circuit having a resistance of 1 ohm. This is the force created to move electrons through a circuit.
Meter
Volt
Horsepower
Voltage Drop
13. The liquid solution (sometime a paste) in which the electrodes are placed.
Millivolt
Frequency
Electrolyte
Step- Down Transformer
14. Total and complete opposition to the flow of electrons
Three -Phase Circuit
Alternating Current
Impedance
Meter
15. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.
Volt
Conductor
Voltmeter
Current
16. Hardened steel which has been magnetized artificially and which retains its magnetic properties
Permanent Magnet
Ampere
Volt
Current
17. A circuit with more than one path. Current branches to flow in every available path.
Artificial Magnet
Parallel Circuit
Meter
Conductor
18. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.
Plates
Insulator
Electrolyte
Storage Battery
19. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.
Step-Up Transformer
Conductor
Primary Winding
Parallel Circuit
20. A measuring device.
Proton
Electromagnetic Induction
Plates
Meter
21. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).
Volt
Transformer
Electro- Motive Force
Three -Phase Circuit
22. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature
Magnetic Circuit
Residual Magnetism
Factors Governing Resistance
Ohm's Law
23. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.
Lagging Current
Magnetic Circuit
Ohm
Magnetic Field
24. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.
Resistance
Watt
Kilowatt Hour
Electron
25. Several secondary cells connected together for either a greater voltage or current output.
Lagging Current
Current
Atom
Storage Battery
26. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.
Step- Down Transformer
Three -Phase Circuit
Horsepower
Leading Current
27. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.
Frequency
Magnetic Poles
Power
Micro Ampere
28. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.
Permeability
Shells
Ohm's Law
Factors governing the Value of EMF of a Generator
29. A unit of power.
Step- Down Transformer
Magnetic Field
Watt
Kilowatt Hour
30. A material which can be magnetized - principally iron.
Electro- Motive Force
Magnetic Material
Resistance
Volt
31. The difference between the electrical condition of one point in an electric circuit and that of another point which tends to cause current to flow between two points. Measured in volts.
Static Electrical Charge
Potential Difference
Positive Plate
Voltage Drop
32. A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of an atom.
Valance Electron
Alternator
Factors Governing Resistance
Positive Plate
33. The property of a material that opposes the flow of current.
Wattmeter
Electron
Ampere
Resistance
34. One- thousandth of a ampere
Artificial Magnet
Milliampere
Voltmeter
Bimetallic Strip
35. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.
Magnetic Lines of Force
Ampere
Molecule
Free Electrons
36. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.
Ohm's Law
Free Electrons
Electro- Motive Force
Atom
37. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.
Lines of Force
Volt
Electron
Voltage Drop
38. One millionth of an ohm.
Artificial Magnet
Rotor
Micro Ohm
Amp Meter
39. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.
Bimetallic Strip
Meter
Step-Up Transformer
Circuit
40. Meter used to measure resistance in an electrical circuit.
Alternator
Parallel Circuit
Milliampere
Ohmmeter
41. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.
Electromagnet
Step-Up Transformer
Micro Ohm
Electron Flow
42. The area surrounding a magnet in which magnetic properties are exhibited
Magnetic Field
Factors governing the Value of EMF of a Generator
Magnetic Poles
Primary Winding
43. Single POSITIVE electrical charge - located in the middle of an atom.
Proton
Transformer
Parallel Circuit
Magnetic Material
44. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.
Resistance
Condenser
Parallel Circuit
Cycle
45. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field
Electric Generator
Factors governing the Value of EMF of a Generator
Lines of Force
Electro- Motive Force
46. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.
Ohmmeter
Magnetic Material
Fuse
Three -Phase Circuit
47. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.
Kilowatt
Ohm
Electric Generator
Permeability
48. The condition where the free electrons are caused to move in the same direction along or through a conductor.
Armature
Kilowatt Hour
Conductor
Electron Flow
49. A cell which is composed of certain materials which are used up during the process of delivering electric current.
Primary Cell
Parallel Circuit
Ohm's Law
Step-Up Transformer
50. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.
Mega Ohm
Magnetism
Ohm
Step- Down Transformer