The Temperature Coefficient of Resistivity of Iron Is 5

question 16

Multiple Choice

The temperature coefficient of resistivity of iron is 5.0 × 10⁻³ / °C; that of carbon is −0.50 × 10⁻³ / °C. When an iron wire and a carbon rod, each having the same 10-Ω resistance at 20°C, are cooled from that temperature to −80°C, the new ratio of the resistance of the carbon rod to the resistance of the iron wire at the lower temperature is

• A)−0.10.
• B)+1.9.
• C)+2.1.
• D)−10.
• E)+10.

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Definitions:

Motivational Interviewing

A counseling approach that aims to enhance a person's motivation to change by exploring and resolving ambivalence.

Helper-Centered Style

A communication approach where the focus is on the perspectives and needs of the helper or therapist, which can contrast with client-centered approaches.

Directive Approach

A method in therapy or coaching where the professional actively gives instructions or guidance to shape the client's behavior or decisions.

Miller And Rollnick

Psychologists William R. Miller and Stephen Rollnick, known for developing motivational interviewing, a client-centered counseling style for eliciting behavior change.