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Test your basic knowledge |
Basic Electricity Vocab
Start Test
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 moving part of a dynamo or motor consisting of coils of wire around an iron core.
Potential Difference
Armature
Secondary Cell
Magnetic Poles
2. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).
Electro- Motive Force
Kilowatt
Armature
Mega Ohm
3. An alternating current which current cycle begins earlier than its voltage cycle.
Leading Current
Fuse
Magnetism
Ampere
4. The rotating member of an electrical machine.
Rotor
Horsepower
Mega Ohm
Leading Current
5. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.
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6. A cell which is composed of certain materials which are used up during the process of delivering electric current.
Micro Ampere
Frequency
Primary Cell
Electromagnetic Induction
7. Coil connected to the source of power on a transformer.
Kilowatt Hour
Step-Up Transformer
Short Circuit
Primary Winding
8. The area surrounding a magnet in which magnetic properties are exhibited
Three -Phase Circuit
Permeability
Magnetic Field
Magnetic Circuit
9. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.
Leading Current
Condenser
Electro- Motive Force
Voltmeter
10. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.
Plates
Electrode
Circuit
Non - Magnetic Material
11. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.
Electron
Coulomb
Amp Meter
Ohm's Law
12. Several secondary cells connected together for either a greater voltage or current output.
Step- Down Transformer
Residual Magnetism
Parallel Circuit
Storage Battery
13. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.
Kilowatt Hour
Step- Down Transformer
Free Electrons
Electrical Circuit
14. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.
Conductor
Resistor
Series Circuit
Magnetic Pole
15. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.
Free Electrons
Electric Generator
Electron Flow
Shells
16. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).
Lagging Current
Secondary Winding
Storage Battery
Proton
17. The center portion of an atom which has a positive electrical charge.
Micro Volt
Nucleus
Electric Generator
Three -Phase Circuit
18. The condition where the free electrons are caused to move in the same direction along or through a conductor.
Electron Flow
Permanent Magnet
Micro Ohm
Volt
19. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.
Transformer
Voltage Drop
Conductor
Current
20. An instrument for measuring electric current
Kilowatt
Artificial Magnet
Micro Ohm
Amp Meter
21. A circuit with only one path for current to flow. There are no branches.
Rotor
Plates
Short Circuit
Series Circuit
22. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.
Artificial Magnet
Millivolt
Positive Plate
Static Electrical Charge
23. Occurs when a stream of electrons are caused to move through a conductor.
Resistance
Primary Winding
Current
Step- Down Transformer
24. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.
Magnetic Field
Proton
Mega Ohm
Magnetic Poles
25. The magnetism which a material retains after the magnetic force which magnetized it has been removed.
Magnetic Circuit
Nucleus
Residual Magnetism
Electric Generator
26. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...
Lagging Current
Voltmeter
Non - Magnetic Material
Magnetic Material
27. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.
Artificial Magnet
Magnetism
Ohm's Law
Storage Battery
28. An alternating current which current cycle begins later that its voltage cycle.
Series Circuit
Lagging Current
Nucleus
Primary Cell
29. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.
Nucleus
Lagging Current
Three -Phase Circuit
Ampere
30. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.
Current
Step- Down Transformer
Rotor
Impedance
31. One millionth of an ohm.
Micro Ohm
Voltage Drop
Micro Ampere
Voltmeter
32. A rate of movement of electrons through a conductor.
Current
Electrode
Kilowatt
Impedance
33. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.
Power
Step-Up Transformer
Magnetic Field
Positive Plate
34. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.
Permanent Magnet
Plates
Electromagnetic Induction
Non - Magnetic Material
35. Single POSITIVE electrical charge - located in the middle of an atom.
Proton
Static Electrical Charge
Free Electrons
Parallel Circuit
36. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.
Alternating Current
Frequency
Electric Generator
Short Circuit
37. A material which can be magnetized - principally iron.
Step- Down Transformer
Wattmeter
Power
Magnetic Material
38. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field
Coulomb
Circuit
Factors governing the Value of EMF of a Generator
Micro Volt
39. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)
Electrode
Three -Phase Circuit
Magnetic Lines of Force
Fuse
40. One million ohms.
Power
Mega Ohm
Rheostat
Voltmeter
41. A resistor designed so that its resistance is readily adjusted.
Electromagnetic Induction
Rheostat
Current
Electro- Motive Force
42. The space around a magnet in which the magnetic force is felt.
Magnetic Field
Condenser
Resistance
Valance Electron
43. Shows relationship between Current - Voltage - Wattage and Resistance.
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44. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours
Ampere
Electric Generator
Kilowatt Hour
Micro Ampere
45. A material with few free electrons. A structure or material used to prevent the passage of current.
Step-Up Transformer
Circuit
Resistance
Insulator
46. Hardened steel which has been magnetized artificially and which retains its magnetic properties
Permanent Magnet
Parallel Circuit
Alternator
Magnetic Lines of Force
47. A circuit with two or more paths for the current to take.
Resistance
Bound Electrons
Parallel Circuit
Electron Flow
48. 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.
Wattmeter
Parallel Circuit
Circuit
Alternating Current
49. 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
Alternator
Secondary Winding
Molecule
Electrical Circuit
50. 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.
Voltmeter
Electrode
Insulator
Potential Difference