PH-3
I–V characteristics
Physics · Secondary 3 · Hard · I–V characteristics
A student measures the I–V characteristic of a filament lamp. She obtains these points: at 1.0 V, current = 0.20 A; at 2.0 V, current = 0.35 A; at 3.0 V, current = 0.45 A. What does this I–V data show about the resistance of the lamp as the voltage increases?
- Its resistance increases as the voltage increases.
- Its resistance decreases as the voltage increases.
- Its resistance stays constant at all voltages.
- Its resistance is always zero.
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