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Test your basic knowledge |
Basic Electricity Vocab
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.
Conductor
Storage Battery
Secondary Cell
Secondary Winding
2. Lines representing the direction of the magnetic force in a magnetic field.
Magnetic Lines of Force
Electro- Motive Force
Electron Flow
Alternating Current
3. The dissimilar metals which are placed in an electrolyte to form a cell.
Wattmeter
Series - Parallel Circuit
Natural Magnet
Electrode
4. A circuit with two or more paths for the current to take.
Lagging Current
Series Circuit
Parallel Circuit
Nucleus
5. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.
Rotor
Kilowatt Hour
Permeability
Electrode
6. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.
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7. 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
Permeability
Series Circuit
Molecule
8. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.
Ohm's Law
Voltmeter
Ampere
Alternator
9. The property of a material that opposes the flow of current.
Magnetic Circuit
Resistance
Magnetic Field
Coulomb
10. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.
Wattmeter
Volt
Alternator
Magnetic Field
11. A material that has many free electrons thus allowing electric current to flow through it easily.
Conductor
Permanent Magnet
Resistance
Ohmmeter
12. One millionth of an ohm.
Micro Ohm
Rheostat
Power
Series Circuit
13. A material with few free electrons. A structure or material used to prevent the passage of current.
Current
Insulator
Atom
Plates
14. In a battery - the electrode which takes up the electrons returning from the external circuit.
Plates
Free Electrons
Lines of Force
Positive Plate
15. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours
Magnetic Lines of Force
Ohm's Law
Primary Cell
Kilowatt Hour
16. 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)
Millivolt
Kilowatt
Magnetic Pole
Voltmeter
17. The area surrounding a magnet in which magnetic properties are exhibited
Electron
Three -Phase Circuit
Magnetic Field
Molecule
18. A complete sequence of events - as an alternating- current cycle.
Electron
Cycle
Volt
Kilowatt
19. Several secondary cells connected together for either a greater voltage or current output.
Storage Battery
Ohm's Law
Parallel Circuit
Kilowatt
20. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.
Primary Winding
Voltage Drop
Primary Cell
Factors Governing Resistance
21. The liquid solution (sometime a paste) in which the electrodes are placed.
Conductor
Current
Electrolyte
Magnetic Pole
22. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature
Permanent Magnet
Ampere
Free Electrons
Factors Governing Resistance
23. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.
Short Circuit
Electrical Circuit
Voltage Drop
Static Electrical Charge
24. 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
Power
Ohm's Law
Electrical Circuit
Plates
25. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.
Kilowatt Hour
Magnetism
Factors Governing Resistance
Step- Down Transformer
26. The number of cycles per second. Example: 60 cycles per second alternating current.
Ohm's Law
Circuit
Factors governing the Value of EMF of a Generator
Frequency
27. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.
Valance Electron
Three -Phase Circuit
Wattmeter
Frequency
28. The unit of Electro- Motive Force
Frequency
Permeability
Rotor
Volt
29. An alternating current which current cycle begins later that its voltage cycle.
Free Electrons
Lines of Force
Magnetic Circuit
Lagging Current
30. A circuit with more than one path. Current branches to flow in every available path.
Proton
Wattmeter
Impedance
Parallel Circuit
31. The magnetism which a material retains after the magnetic force which magnetized it has been removed.
Atom
Cycle
Primary Cell
Residual Magnetism
32. A rate of movement of electrons through a conductor.
Current
Resistor
Micro Ohm
Magnetism
33. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).
Alternator
Non - Magnetic Material
Secondary Winding
Parallel Circuit
34. 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
Factors Governing Resistance
Magnetic Field
Condenser
35. Opposition to current flow
Static Electrical Charge
Cycle
Kilowatt
Resistance
36. A generator that produces alternating current.
Potential Difference
Millivolt
Alternator
Magnetic Lines of Force
37. 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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38. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.
Condenser
Parallel Circuit
Resistance
Ampere
39. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.
Coulomb
Nucleus
Micro Volt
'Crose Phase'
40. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.
Plates
Bound Electrons
Lines of Force
Electron Flow
41. Occurs when a stream of electrons are caused to move through a conductor.
Factors governing the Value of EMF of a Generator
Current
Electro- Motive Force
Potential Difference
42. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.
Volt
Rheostat
Resistor
Kilowatt
43. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)
Potential Difference
Electro- Motive Force
Parallel Circuit
Fuse
44. A unit of POWER. 1 kilowatt = 1 -000 watts
Electron
Volt
Insulator
Kilowatt
45. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.
Magnetic Material
Lines of Force
Volt
Bimetallic Strip
46. 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.
Transformer
Static Electrical Charge
Mega Ohm
Valance Electron
47. 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.
Electric Generator
Shells
Primary Cell
Circuit
48. A circuit in which there is resistance (load) connected both in series and parallel.
Electromagnetic Induction
Frequency
Primary Winding
Series - Parallel Circuit
49. Coil connected to the source of power on a transformer.
Armature
Series Circuit
Primary Winding
Transformer
50. A resistor designed so that its resistance is readily adjusted.
Artificial Magnet
Static Electrical Charge
Rheostat
Volt
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