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Test your basic knowledge |
Electronics
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 smallest particle to which an element can be reduced and still retain its characteristics.
Open circuit
Closed circuit
Ohms
Atom
2. A unit of electric charge that represents a large number of electrons. ~ 6.28 x 1018 electrons
Electron
Electromotive force (EMF)
Free electrons
Coulomb (C)
3. Electrons located in the outer orbit of an atom that are easily removed and result in flow of electric current.
AC Current
Free electrons
Ohm (O)
Load
4. The unit of measurement of electric resistance.
Why resistors are important
Capacitor
Power
Ohm (O)
5. An atomic particle said to have a negative (-) electric charge; electrons are the means by which the transfer of electric energy takes place.
Metallic bonding
Static charge
Voltage
Electron
6. Resistors are objects that resist flow. If a light bulb gets to much electricty it can burn out. In other terms - NOT GOOD!!
Ohms
Why resistors are important
Atom
Electromotive force (EMF)
7. The part of an electric system that supplies energy to other parts of the system - such as a battery that supplies energy for a flashlight.
Atom
Orbital
Source
Insulator
8. (R) The opposition to the flow of electric current in a circuit; its unit of measurement is the ohm (O).
Resistance
Electrostatic field
Insulator
Capacitor
9. Do Opposites attract or move away from each other?
Potential energy
Opposites attract
Electromotive force (EMF)
Capacitor
10. Electric force - or pressure - that causes current to flow in a circuit.
Orbital
Ohm (O)
Path
Voltage
11. Energy that exists because of movement.
Why resistors are important
Kinetic energy
LED
Capacitor
12. The unit of measurement of electric power.
Element
Potential energy
AC Current
Watt (W)
13. V= IR or Voltage is equal to current times resistance
Voltage
Ohms
Ohm (O)
Resistor
14. The method by which loosely held atoms are bound together in metals.
Orbital
Current
Resistance
Metallic bonding
15. A device that stores energy between a pair of conductors
Metallic bonding
Capacitor
Electromotive force (EMF)
Volt (V)
16. The part of an electric system that shows whether the system is on or off or that a specific quantity is present.
Semiconductor
Static electricity
Indicator
Energy
17. A circuit that has a broken path so that no electric current can flow through it. A circuit with infinite resistance.
Open circuit
Resistance
Ampere (A)
Control
18. A positively charged atom
Indicator
Volt (V)
Proton
Resistance
19. The part of an electric system through which electrons travel from a source to a load - such as the electric wiring used in a building.
Closed circuit
Orbit
Path
Voltage
20. Energy that exists because of position.
Proton
Short circuit
AC Current
Potential energy
21. The part of an electric system that affects what the system does; a switch to turn on and turn off a light is a type of control.
Control
Static charge
Path
AC Current
22. Current flow assumed to be in the direction of electron movement from a negative (-) potential to a positive (+) potential.
Electron current flow
Orbital
LED
Control
23. A material that offers a high resistance to electric current flow.
Insulator
Electron current flow
LED
Ohms
24. An object which resists the flow of electricity.
Electrostatic field
Ampere (A)
Metallic bonding
Resistor
25. Something that can turn on or off the flow of electricty.
Atom
Power
Capacitor
Switch
26. A neutrally charged atom
Neutron
DC Current
Ohms
Source
27. Electrons in the outer orbit of an atom.
DC Current
Current
Element
Valence electrons
28. Electricity at rest caused by accumulation of either positive or negative electric charge.
Static electricity
Short circuit
Electron current flow
Capacitor
29. The movement of electric charge; the flow of electrons through an electric circuit.
Current
Electron current flow
Ohms
Static electricity
30. An atom that does not release electrons under normal conditions.
Conductor
Voltage
Volt (V)
Stable atom
31. The path along which electrons travel around the nucleus of an atom.
Orbit
Current
Ohms
Atom
32. The basic materials that make up all other materials; they exist by themselves (such as copper - hydrogen - carbon) or in combination with other elements (water is a combination of the elements hydrogen and oxygen).
AC
Insulator
Metallic bonding
Element
33. The transforming or transferring of energy.
Orbital
Voltage
Work
Closed circuit
34. The pressure - or force - that causes electric current to flow.
Electromotive force (EMF)
Kinetic energy
Source
Conductor
35. Current periodically reverses direction
Energy
Opposites attract
Power
AC Current
36. A charge on a material that is said to be either positive or negative.
AC Current
Electrostatic field
Static charge
Free electrons
37. Current flows in one direction only.
Why resistors are important
Resistance
Voltage
DC Current
38. A material that allows electric current to flow through it easily.
Conductor
Static charge
Static electricity
Switch
39. A circuit that forms a complete path so that electric current can flow through it.
Open circuit
AC
Closed circuit
Valence electrons
40. The unit of electric charge - which is the basic unit of measurement for current flow in an electric circuit.
Path
Voltage
Ampere (A)
Static electricity
41. The part of an electric system that converts electric energy into another form of energy - such as an electric motor that converts electric energy into mechanical energy.
Orbit
Load
Proton
Voltage
42. Areas through which electrons move; designated as s - p - d - and f.
Electron
Load
Voltage
Orbital
43. A material that has a value of electric resistance between that of a conductor and an insulator and is used to manufacture solid- state devices such as diodes and transistors.
Ohm (O)
Power
Proton
Semiconductor
44. The difference of electrical potential between to points on a circuit
Voltage
Kinetic energy
Control
Ohms
45. The rate at which work is done.
Watt (W)
Proton
Element
Power
46. Current flow assumed to be in a direction from high charge concentration (+) to low charge concentration (-).
Current
Watt (W)
Stable atom
Conventional current flow
47. Light Emitting Diode
LED
Current
Electrostatic field
Semiconductor
48. A circuit that forms a direct path across a voltage source (with little or no resistance) so that a very high and possibly unsafe electric current flows.
Open circuit
Switch
Short circuit
Voltage
49. The unit of measurement of electric potential.
Ohm (O)
Volt (V)
Element
Insulator
50. The capacity to do work.
Opposites attract
Ohm (O)
Voltage
Energy