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Based on the graphs in the figures, what will be the conclusion?

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The resistor device and the lightbulb both obeyed ohm’s law

Neither the resistor device nor the lightbulb obey Ohm’s law

The resistor device obey Ohm’s law, but the lightbulb did not

The lightbulb obeys Ohm’s law, but the resistor device did not

answer is C.

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Detailed Solution

Based on the graphs in figures, the conclusion is that the resistor device obeying Ohm’s law but the lightbulb did not.
Graph 1 is approximately linear. This means that its slope

I - V

is constant, which means that

R = \frac{V}{I}

is constant. Therefore the resistor device obeyed ohm’s law. In the second graph the resistance is non-linear, and the resistance is not constant.

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