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The flashcards below were created by user Hazard on FreezingBlue Flashcards.

1. The resistance to magnetic flux is called
reluctance
2. What is the MKS unit for magnetic flux
Weber
3. Hardened steel is difficult to magnetize because
of its low permiability
4. to measure electrical potential you should use a
Voltmeter
5. How should a voltmeter be connected in a circuit to measure voltage?
In parallel with the potential points being measured
6. What is used to measure electrical resistance
ohmmeter and meg-ohmmeter
7. What property of a material is present in every electrical circuit?
resistance
8. Resistors are connected to electrical circuits to
Limit current
9. Resistors connected in series across a voltage source to obtain a lower voltage are called voltage
dividers
10. opposition to any voltage change in a circuit is caused by
capacitance
11. What is the basic unit for measuring the capacitance of a capacitor
12. When capacitors are connected in parallel the effective capacitance of the circuit is
increased
13. the opposition to any crrent change in an ac circuit caused by inductance is called
inductive resistance
14. Unit used to measure inductive resistance
Ohm
15. The ineraction between the roto and stator in an ac motor that causes the rotor to rotate is caused by the
magneticfeilds
16. In a Y connected load or source, the line voltage is found by what formual?
El= sqroute 3Ip
17. the formula for finding line current in a Y connected load or source is
IL=Ip
18. In a delta connected load what formula
EL=EP
19. The Cos 0 used in 3 phase power formulas is the
power factor
20. One way of measuring power in a 3 phase circuit is by the use of
3-wattmeters
21. When measuring the power of a 3 phase circuit at 50 percent power factor using only two watt-meters one watt-meter will read
Zero
22. Dielectric strength is usually expressed in
volts
23. few electrons and poor conductor is
insulator
24. what are insulating materials sometimes called
Dielectrics
25. by how much dose the heat caused by current flowing through a wire increase?
the square of the increase in current
26. Ohms law simple terms
The higher the voltage the more current flow through a given resistance
27. Desirable characteristics of conductor insulation include
flexibility and mechanical strength
28. A channel that holds and protects cables or wires is a
Raceway
29. BX cable has the same general characteristics as
flexible conduit
30. to which transformer winding is voltage supplied?'
Primary
31. To which transformer winding is the load connected?
Secondary
32. The volt amperes of the primary winding and the volt amperes of the secondary winding are
equal
33. The output or capacity of a transformer is measured in
kVa
34. Transformer losses are classified as copper losses and
core losses
35. Transformer core eddy current losses are reduced  by using a
laminated core
36. What voltage will appear across the secondary terminals of an auto transformer if the common winding should open
primary
37. A variable transformer is a continuously adjustable
autotransformer
38. while working on a current transformer the secondary winding must be
short circuited
39. electric current is measured in amperes which are
Coulomb per second
40. According to ohms law voltage is equal to
resistance times current
41. What happens to total current flow if the voltage of a series circuit is doubled and the resistance stays constant
doubles
42. What is common to all components of a series circuit
current
43. if one leg of parallel circuit develops an open the total current will
decrease
44. What is common to all components of a parallel circuit
voltage
45. General purpose transformers are usually
dry type
46. A synthetic liquid used in Transformers is known as