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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. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.
Coulomb
Millivolt
Static Electrical Charge
Frequency
2. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.
Shells
Current
Ohmmeter
Wattmeter
3. A measuring device.
Meter
Resistance
Parallel Circuit
Short Circuit
4. Lines representing the direction of the magnetic force in a magnetic field.
Magnetic Lines of Force
Proton
Bimetallic Strip
Magnetism
5. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.
Magnetic Material
Secondary Winding
Frequency
Atom
6. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.
Condenser
Resistance
Secondary Cell
Bimetallic Strip
7. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.
Potential Difference
Ohm's Law
Coulomb
Armature
8. 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
Bimetallic Strip
Frequency
Kilowatt
Electrical Circuit
9. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.
Magnetic Pole
Millivolt
Three -Phase Circuit
Magnetic Lines of Force
10. 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.
Non - Magnetic Material
Series Circuit
Series - Parallel Circuit
Bimetallic Strip
11. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field
Cycle
Resistance
Factors governing the Value of EMF of a Generator
Rheostat
12. One millionth of a volt.
Electromagnetic Induction
Factors Governing Resistance
Micro Volt
Wattmeter
13. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.
Ampere
Electromagnetic Induction
Mega Ohm
Alternating Current
14. A cell which is composed of certain materials which are used up during the process of delivering electric current.
Three -Phase Circuit
Proton
Lagging Current
Primary Cell
15. 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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16. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours
Power
Factors Governing Resistance
Short Circuit
Kilowatt Hour
17. The space around a magnet in which the magnetic force is felt.
Magnetic Field
Alternator
Secondary Cell
Parallel Circuit
18. A complete sequence of events - as an alternating- current cycle.
Leading Current
Cycle
Micro Volt
Ohmmeter
19. A circuit in which there is resistance (load) connected both in series and parallel.
Series - Parallel Circuit
Bimetallic Strip
Electrical Circuit
Insulator
20. The liquid solution (sometime a paste) in which the electrodes are placed.
Rotor
Insulator
Resistance
Electrolyte
21. The center portion of an atom which has a positive electrical charge.
Step-Up Transformer
Electromagnetic Induction
Static Electrical Charge
Nucleus
22. One millionth of an ampere.
Ampere
Ohm's Law
Micro Ampere
Molecule
23. 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.
Lines of Force
Wattmeter
Leading Current
Volt
24. A circuit with only one path for current to flow. There are no branches.
Voltmeter
Resistance
Series Circuit
Artificial Magnet
25. One- thousandth of volt.
Magnetic Field
Proton
'Crose Phase'
Millivolt
26. An alternating current which current cycle begins later that its voltage cycle.
Magnetic Poles
Lagging Current
Resistor
Potential Difference
27. A material which can be magnetized - principally iron.
Micro Ohm
Magnetic Material
Permeability
Non - Magnetic Material
28. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.
Storage Battery
Factors Governing Resistance
Magnetic Poles
Secondary Cell
29. 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.
Three -Phase Circuit
Electro- Motive Force
Potential Difference
Leading Current
30. The moving part of a dynamo or motor consisting of coils of wire around an iron core.
Secondary Winding
Kilowatt
Armature
Micro Volt
31. A rate of movement of electrons through a conductor.
Lagging Current
Series Circuit
Current
Factors Governing Resistance
32. The unit of Electro- Motive Force
Volt
Storage Battery
Coulomb
Voltage Drop
33. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.
Coulomb
Natural Magnet
Permeability
Amp Meter
34. One- thousandth of a ampere
Magnetic Pole
Milliampere
Step- Down Transformer
Step-Up Transformer
35. A circuit with two or more paths for the current to take.
Parallel Circuit
Voltage Drop
Ohm's Law
Micro Volt
36. Smallest part a substance can physically divided into composed of 2 or more atoms.
Residual Magnetism
Plates
Molecule
Lines of Force
37. Total and complete opposition to the flow of electrons
Electric Generator
Electrode
Impedance
Ohm's Law
38. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature
Amp Meter
Resistance
Parallel Circuit
Factors Governing Resistance
39. In a battery - the electrode which takes up the electrons returning from the external circuit.
Positive Plate
Molecule
Electric Generator
Electron Flow
40. Meter used to measure resistance in an electrical circuit.
Residual Magnetism
Ohmmeter
Voltage Drop
Electrical Circuit
41. Negative charge of electricity
Lagging Current
Electron
Residual Magnetism
Conductor
42. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.
Electrode
Step- Down Transformer
Natural Magnet
Armature
43. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.
Permeability
Condenser
Millivolt
Voltage Drop
44. 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.
Ohm
Millivolt
Series Circuit
Non - Magnetic Material
45. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.
Proton
Magnetism
Impedance
Electron Flow
46. Hardened steel which has been magnetized artificially and which retains its magnetic properties
Plates
Permanent Magnet
Natural Magnet
Rotor
47. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.
Magnetism
Electric Generator
Static Electrical Charge
Magnetic Field
48. Opposition to current flow
Electric Generator
Ohm's Law
Positive Plate
Resistance
49. 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
Circuit
Conductor
Magnetic Field
50. An alternating current which current cycle begins earlier than its voltage cycle.
Transformer
Leading Current
Non - Magnetic Material
Electromagnet