In the Figure, a Straight Wire Carries a Steady Current

question 15

Multiple Choice

In the figure, a straight wire carries a steady current I perpendicular to the plane of the page. A bar is in contact with a pair of circular rails, and rotates about the straight wire. The direction of the induced current through the resistor R is

• A) from a to b.
• B) from b to a.
• C) There is no induced current through the resistor.

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Definitions:

Content Validity

When the content of a test includes a representative sample of behaviours thought to be related to the construct (that is, the concept or entity) the test is designed to measure.

Representative Sample

A portion of the population that represents the entire group accurately.

Single-subject Design

A research design that focuses on the responses of a single participant to document the effectiveness of an intervention.

Case Study

A non-experimental investigative method resulting in a description of the past and current functioning of a single individual, generally the result of information gathered through intense interactions over long periods. Variables such as family history, education, employment history, medical history, social relationships, and the patient’s level of psychological adjustment are described. The goal is a description of an individual’s current problem, and its relation to his or her past. A case study seeks to provide a theory concerning the etiology of a patient’s problem or psychological makeup, and/or a course of treatment and outcome. The oldest approach to the study of abnormal behaviour.