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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. 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.
Meter
Bimetallic Strip
Kilowatt
Kilowatt Hour
2. In a battery - the electrode which takes up the electrons returning from the external circuit.
Watt
Ohm's Law
Positive Plate
Free Electrons
3. Positive charge of electricity. Located in the nucleus of the atom.
Proton
Lines of Force
Resistance
Impedance
4. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field
Current
Factors governing the Value of EMF of a Generator
Magnetic Circuit
Magnetic Pole
5. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)
Voltage Drop
Parallel Circuit
Meter
Fuse
6. A measuring device.
Alternator
Ohm's Law
Meter
Step- Down Transformer
7. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.
Millivolt
Primary Cell
Wattmeter
Voltage Drop
8. A circuit in which there is resistance (load) connected both in series and parallel.
Ohmmeter
Plates
Electromagnet
Series - Parallel Circuit
9. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.
Atom
Resistance
Magnetism
Lagging Current
10. 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.
Current
Nucleus
Valance Electron
Meter
11. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.
Secondary Winding
Electron
Meter
Condenser
12. A material with few free electrons. A structure or material used to prevent the passage of current.
Horsepower
Insulator
Micro Ampere
Static Electrical Charge
13. A material that has many free electrons thus allowing electric current to flow through it easily.
Potential Difference
Electrical Circuit
Secondary Winding
Conductor
14. A circuit with only one path for current to flow. There are no branches.
Series Circuit
Natural Magnet
Magnetic Lines of Force
Lagging Current
15. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.
Mega Ohm
Kilowatt
'Crose Phase'
Alternating Current
16. Coil connected to the source of power on a transformer.
Primary Winding
Primary Cell
Permanent Magnet
Millivolt
17. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.
Plates
Circuit
Magnetic Material
Volt
18. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.
Electron Flow
Electron
Residual Magnetism
Secondary Winding
19. One millionth of a volt.
Millivolt
Ohm
Micro Volt
Shells
20. 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.
Kilowatt Hour
Potential Difference
Transformer
Leading Current
21. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.
Nucleus
Permeability
Natural Magnet
Series - Parallel Circuit
22. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.
Electric Generator
Impedance
Current
Ampere
23. The number of cycles per second. Example: 60 cycles per second alternating current.
Resistance
Frequency
Nucleus
Parallel Circuit
24. 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.
Residual Magnetism
Voltmeter
Voltage Drop
Molecule
25. A cell which is composed of certain materials which are used up during the process of delivering electric current.
Non - Magnetic Material
Alternating Current
Resistor
Primary Cell
26. Smallest part a substance can physically divided into composed of 2 or more atoms.
Magnetic Pole
Transformer
Electromagnet
Molecule
27. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.
Static Electrical Charge
Mega Ohm
Parallel Circuit
Electron Flow
28. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.
Voltage Drop
Shells
Natural Magnet
Horsepower
29. The condition where the free electrons are caused to move in the same direction along or through a conductor.
Step- Down Transformer
Factors Governing Resistance
Circuit
Electron Flow
30. An instrument for measuring electric current
Proton
Amp Meter
Electromagnetic Induction
Circuit
31. Negative charge of electricity
Factors governing the Value of EMF of a Generator
Series - Parallel Circuit
Electron
Magnetic Circuit
32. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.
Voltmeter
Electromagnetic Induction
Bound Electrons
Three -Phase Circuit
33. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours
Atom
Kilowatt Hour
Magnetic Pole
Current
34. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.
Transformer
Secondary Cell
Three -Phase Circuit
Lagging Current
35. The area surrounding a magnet in which magnetic properties are exhibited
Magnetic Field
Permanent Magnet
Magnetic Material
Ampere
36. A unit of power.
Millivolt
Magnetic Lines of Force
Watt
Kilowatt
37. Lines representing the direction of the magnetic force in a magnetic field.
Storage Battery
Step- Down Transformer
Magnetic Lines of Force
Magnetic Field
38. One millionth of an ohm.
Static Electrical Charge
Horsepower
Primary Winding
Micro Ohm
39. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...
Mega Ohm
Non - Magnetic Material
Cycle
Volt
40. The moving part of a dynamo or motor consisting of coils of wire around an iron core.
Armature
Insulator
Potential Difference
Artificial Magnet
41. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.
Micro Volt
Positive Plate
Milliampere
Resistor
42. A rate of movement of electrons through a conductor.
Lagging Current
Magnetism
Resistor
Current
43. One- thousandth of volt.
Ohm
Millivolt
Milliampere
Micro Volt
44. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.
Current
Leading Current
Lines of Force
Bimetallic Strip
45. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.
Free Electrons
Armature
Magnetic Field
Rotor
46. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.
Series - Parallel Circuit
Three -Phase Circuit
Magnetic Pole
Potential Difference
47. The dissimilar metals which are placed in an electrolyte to form a cell.
Electrode
Secondary Winding
Rheostat
Transformer
48. Shows relationship between Current - Voltage - Wattage and Resistance.
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49. A resistor designed so that its resistance is readily adjusted.
Rheostat
Permanent Magnet
Primary Cell
Cycle
50. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.
Proton
Magnetic Circuit
Amp Meter
Step-Up Transformer