A Motor Sometimes Burns Out When Its Load Is Suddenly

question 56

Multiple Choice

A motor sometimes burns out when its load is suddenly increased because the resulting sudden decrease in its rotational frequency causes

• A) an increased back EMF and an increased current flow.
• B) a decreased back EMF and a decreased current flow.
• C) a decreased back EMF and zero current flow.
• D) an increased back EMF and a decreased current flow.
• E) a decreased back EMF and an increased current flow.

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Definitions:

P-Value

In hypothesis testing, the probability of observing the test results, or more extreme results, if the null hypothesis is true, used to determine statistical significance.

Null Hypothesis

A statistical hypothesis that suggests there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.

P-Value

In statistical hypothesis testing, the probability of obtaining test results at least as extreme as the ones observed during the study, assuming that the null hypothesis is true.

Null Hypothesis

A default position that there is no difference or effect, in statistics, until evidence suggests otherwise.