Students are provided with an unknown resistor that has a constant resistance for all potential differences. The students are instructed to plot an I-V graph for the resistor. What is a device that has a constant resistance for all potential differences called? A constant current device B non-ohmic device C ohmic device D constant voltage device

Students are provided with an unknown resistor that has a constant resistance for all potential differences. The students are instructed to plot an I-V graph for the resistor.Which, if any, of the following are true for I-V graphs of ohmic devices?Amust be a horizontal lineBmust pass through the originCmust not pass through the originDnone of the above

Students are provided with an unknown resistor that has a constant resistance for all potential differences. The students are instructed to plot an I-V graph for the resistor.Which of the following best describes the gradient of an I-V graph for such a device?Anegative and constantBpositive and constantCpositive and varyingDnegative and varying

Resistance is equal to the potential difference divided by what? Give the name, not the unit of measurement.

Jason is investigating the resistance in a test wire using the circuit below. He is using a voltmeter to measure the potential difference across... what?

For the resistor, the plot of V vs I (with voltage on the y axis and current on the x axis) looks like: