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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.
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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. Single POSITIVE electrical charge - located in the middle of an atom.
Factors governing the Value of EMF of a Generator
Proton
Secondary Winding
Ampere
2. The condition where the free electrons are caused to move in the same direction along or through a conductor.
Impedance
Electron Flow
Fuse
Lagging Current
3. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field
Three -Phase Circuit
Valance Electron
Coulomb
Factors governing the Value of EMF of a Generator
4. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.
Voltage Drop
Artificial Magnet
Magnetic Poles
Permanent Magnet
5. A unit of power.
Conductor
Storage Battery
Valance Electron
Watt
6. An instrument for measuring electric current
Frequency
Current
Free Electrons
Amp Meter
7. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.
Electric Generator
Magnetic Material
Current
Impedance
8. One millionth of an ampere.
Step-Up Transformer
Resistor
Series Circuit
Micro Ampere
9. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.
Proton
Resistor
Micro Ampere
Electron
10. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.
Electrolyte
Ampere
Residual Magnetism
Alternating Current
11. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.
Horsepower
Proton
Non - Magnetic Material
Potential Difference
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.
Voltage Drop
Electron Flow
Armature
Volt
13. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)
Molecule
Fuse
Electro- Motive Force
'Crose Phase'
14. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.
Magnetic Pole
Permeability
Potential Difference
Short Circuit
15. One millionth of an ohm.
Valance Electron
Micro Ohm
Proton
Magnetic Material
16. A material with few free electrons. A structure or material used to prevent the passage of current.
Plates
Insulator
Magnetic Circuit
Millivolt
17. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature
Secondary Winding
Ohmmeter
Step-Up Transformer
Factors Governing Resistance
18. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.
Electric Generator
Fuse
Series Circuit
Factors Governing Resistance
19. The center portion of an atom which has a positive electrical charge.
Nucleus
Resistance
Plates
Watt
20. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.
Ohmmeter
Impedance
Secondary Winding
Lines of Force
21. A material that has many free electrons thus allowing electric current to flow through it easily.
Conductor
Voltmeter
Primary Cell
Residual Magnetism
22. Opposition to current flow
Resistance
Ohm's Law
Current
Step-Up Transformer
23. A device used to change the voltage of an alternating current circuit.
Transformer
Storage Battery
Alternating Current
Micro Volt
24. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.
Ohm's Law
Plates
Magnetic Poles
'Crose Phase'
25. The area surrounding a magnet in which magnetic properties are exhibited
Electron
Primary Cell
Magnetic Field
Alternating Current
26. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).
Residual Magnetism
Cycle
Bound Electrons
Secondary Winding
27. 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.
Electron Flow
Bimetallic Strip
Electromagnet
Permeability
28. An alternating current which current cycle begins earlier than its voltage cycle.
Conductor
Mega Ohm
Leading Current
Ampere
29. One million ohms.
Valance Electron
Artificial Magnet
Mega Ohm
Ohm's Law
30. Negative charge of electricity
Magnetic Circuit
Resistor
Electron
Rheostat
31. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.
Storage Battery
Insulator
Voltage Drop
Milliampere
32. An alternating current which current cycle begins later that its voltage cycle.
Molecule
Storage Battery
Series - Parallel Circuit
Lagging Current
33. The liquid solution (sometime a paste) in which the electrodes are placed.
Electrolyte
Bound Electrons
Static Electrical Charge
Plates
34. A unit of POWER. 1 kilowatt = 1 -000 watts
Magnetic Material
Shells
Bimetallic Strip
Kilowatt
35. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.
Free Electrons
Resistance
Micro Volt
Condenser
36. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.
Short Circuit
Volt
Magnetic Circuit
Magnetism
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. A rate of movement of electrons through a conductor.
Current
Step- Down Transformer
Magnetic Material
Valance Electron
39. The rotating member of an electrical machine.
Shells
Secondary Winding
Electromagnet
Rotor
40. A complete sequence of events - as an alternating- current cycle.
Cycle
Non - Magnetic Material
Artificial Magnet
Resistance
41. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.
Nucleus
Ampere
Potential Difference
Three -Phase Circuit
42. A measuring device.
Bimetallic Strip
Meter
Storage Battery
Series Circuit
43. 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)
Short Circuit
Magnetism
Lagging Current
Magnetic Pole
44. One millionth of a volt.
Magnetic Field
Circuit
Micro Volt
Magnetism
45. One- thousandth of volt.
Rheostat
Millivolt
Transformer
Alternator
46. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.
Parallel Circuit
Factors Governing Resistance
Micro Ampere
Step-Up Transformer
47. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.
Electrode
Micro Ohm
Ohm's Law
Shells
48. Meter used to measure resistance in an electrical circuit.
Leading Current
Ohmmeter
Three -Phase Circuit
Resistance
49. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.
Alternator
Cycle
Static Electrical Charge
Electrical Circuit
50. 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.
Electrical Circuit
Mega Ohm
Circuit
Primary Winding
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