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

Magnetism

Quiz

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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