If P(A)= 0

question 22

Multiple Choice

If P(A) = 0.84,P(B) = 0.76,and P(A or B) = 0.90,then P(A and B) is:

• A)0.06
• B)0.14
• C)0.70
• D)0.83

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Definitions:

Differential Setting

In protective relays, refers to the adjustment that determines the difference in current or voltage at which the device will operate to protect electrical equipment.

Compounding

Generally indicates the voltage increase caused by the series field as compared to the voltage drop of the generator.

Exciting

The process of supplying a magnetic field to a core or coil in electrical devices to induce a magnetic flux.

Magnetic Lines

Imaginary lines used to represent the direction and strength of a magnetic field around a magnet or an electric current.