A Certain Sample Carries a Current of 4 a When $\Omega$

question 45

Multiple Choice

A certain sample carries a current of 4 A when the potential difference is 2 V and a current of 10 A when the potential difference is 4 V.This sample:

• A)obeys Ohm's law
• B)has a resistance of 0.5 \(\Omega\) at 2 V
• C)has a resistance of 2 \(\Omega\) at 2 V
• D)has a resistance of 25 \(\Omega\) at 2 V
• E)does not have a resistance

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Definitions:

Massed Practice

A learning strategy that involves intensive, continuous sessions of practice or study with little to no rest between sessions.

Distributed Practice

A learning strategy that involves spreading study sessions out over time, which has been shown to improve retention of information compared to massed practice (cramming).

Three Hours

A period of time equivalent to 180 minutes.

Serial-Position Effect

A psychological phenomenon in which people tend to recall the first and last items in a series best, and the middle items worst.