M3 Electrical Fundamentals Sub-Module No 5 (Quiz No:1)

Magnetism

Quiz

 

1. Heating or sudden shock will cause misalignment of the molecules, causing the strength of a magnet ?
   1.   Increase
   2.   Decrease
   3.   No effect
2. Where no more lines of force can be induced or introduced, the material is then said to be ?
   1.   Non magnetic
   2.   Charged
   3.   Saturated
3. Any substance, such as bismuth, having a permeability of less than one, is considered ?
   1.   Paramagnetic
   2.   Diamagnetic
   3.   Ferromagnetic
4. Measure of opposition to the lines of force through a material, can be compared to the resistance of an electrical circuit ?
   1.   Reluctance
   2.   Inductance
   3.   Capacitance
5. Reluctance of soft iron, for instance, is……...Than that of air ?
   1.   Much lower
   2.   Higher
   3.   Equal
6. Nonferrous metals with a permeability greater than one, such as nickel and cobalt, are called ?
   1.   Diamagnetic
   2.   Para magnetic
   3.   Ferromagnetic
7. Ability of a magnet to hold its magnetism varies greatly with the type of metal and is known as ?
   1.   Resistivity
   2.   Retentively
   3.   Capacitance
8. When a wire contains many loops, it is called a ?
   1.   Wire
   2.   Cable
   3.   Coil
9. Standard unit of magnetomotive force is the ?
   1.   Ampere-turn (at)
   2.   Volt-turn (VT)
   3.   Voltage
10. Gilbert is defined differently, and is a…...Unit than the ampere-turn ?
    1.   Slightly higher
    2.   Very small
    3.   Slightly smaller

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M3 Electrical Fundamentals Sub-Module No 10 (Quiz No:1)

Capacitance

Quiz

 

1. Capacitor is constructed of two parallel plates separated by a nonconductor, called a…………?
   1.   Dielectric
   2.   Distributer
   3.   Conductor
2. It serves as a reservoir or storehouse for electricity ?
   1.   Transformer
   2.   Capacitor
   3.   Resister
3. When the difference in voltage of a and b becomes the same as the voltage of the battery, the current becomes ……..?
   1.   Maximum
   2.   Average
   3.   Zero
4. Electrical charge is measured in units of …………….?
   1.   Ohm
   2.   Coulombs
   3.   Ampere
5. All other factors being equal, further plate spacing of capacitor gives …………….?
   1.   Less capacitance
   2.   Greater capacitance
   3.   No capacitance
6. All other factors being equal, greater permittivity of the dielectric gives ……………….?
   1.   Less capacitance
   2.   Greater capacitance
   3.   No capacitance
7. When capacitors are placed in series, the effective plate separation is increased and the total capacitance is less than that of the………... Capacitor ?
   1.   Smallest
   2.   Greatest
   3.   Any
8. When measuring a capacitor's ability to store an electric charge , the measurement used is ……………?
   1.   Farad
   2.   Coulombs
   3.   Ampere
9. A capacitor capable of holding a farad is capable of holding 1 coulomb of electricity under a force of ………….?
   1.   1 ampere
   2.   1 ohm
   3.   1 volt
10. A good capacitor will block…………?
    1.   Direct current
    2.   Pulsing dc
    3.   Alternating current

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