Random Questions

1. The primary winding of a transformer is the side connected to the load. A.     True    B.     False […]

92. When a load is not connected to the secondary of a transformer: A.     primary current is zero B.

85. What is the total inductance assuming no mutual inductance? mcq8_1031_1.gif A.     0 mH B.     0.69 mH C.

78. What happens when moving expanding lines of force encounter a conductor? A.     Current increases. B.     Voltage is

1. The unit of flux density is: A.     magnetomotive force B.     a weber C.     a maxwell D.

64. You could decrease the time constant of an RL circuit by A.     adding a resistor in parallel with

50. If you wanted to decrease the inductance of a coil, you might increase the: A.     number of turns

43. A practical inductor A.     has inductance B.     has winding resistance C.     has winding capacitance D.   

36. How long until the current is at a maximum? mcq8_1032_1.gif A.     0 mu.jpgs B.     5 mu.jpgs C.

29. During a current change, the ability of a conductor to produce counter emf within itself is called: A.   

22. What is the inductive reactance if the Q of a coil is 60, and the winding resistance is 5

15. The polarity of induced voltage while a field is collapsing is: A.     independent of the force creating it

8. In a purely inductive circuit, A.     current leads voltage by 90° B.     voltage lags current by 90°

1. Electricity may be generated by a wire: A.     carrying current B.     wrapped as a coil C.