A Nichrome Wire Is Used as a Heating Element in a Toaster

question 10

Multiple Choice

A Nichrome wire is used as a heating element in a toaster. From the moment the toaster is first turned on to the moment the wire reaches it maximum temperature, the current in the wire drops by 20.0% from its initial value. What is the temperature change in the wire? The temperature coefficient of resistivity for Nichrome is 0.000400 (°C) ^-1.

• A) 200°C
• B) 400°C
• C) 500°C
• D) 625°C
• E) 300°C

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Definitions:

Shaping

The process of reinforcing successive approximations of a desired behavior to teach new behaviors.

Reinforces

In psychology, refers to consequences that increase the likelihood of the behavior that led to them being repeated in the future.

Variable-Interval

A schedule in operant conditioning where a response is rewarded after an unpredictable amount of time has passed.

Unpredictable

Describes something or someone that is not able to be predicted, due to variability in behavior or characteristics.