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A student makes a graph that shows the electric current through a resistor over time. Which of the following conclusions does the graph best support? The voltage across the resistor decreases until it becomes zero. The voltage across the resistor increases until it reaches a constant value. A fuse in the circuit blows after approximately 30 seconds. The resistance decreases as the voltage increases.



Answer :

To determine which conclusion the graph best supports, we consider Ohm’s Law: (voltage = current x resistance).

Options:

1. Voltage decreases to zero: Current would also decrease to zero.
2. Voltage increases to a constant value: Current would increase and then stabilize.
3. Fuse blows after 30 seconds: Current would suddenly drop to zero at 30 seconds.
4. Resistance decreases as voltage increases: Current would increase rapidly in a nonlinear way.

If the graph shows current dropping to zero at around 30 seconds, it best supports:

Conclusion: A fuse in the circuit blows after approximately 30 seconds.

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