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

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

Slope of I-V graph of a resistor is numerically equal to:

The slope of the V-I graph shall give:(a) resistance (b) reciprocal of resistance (c) power (d) charge

The gradient of a velocity-time graph at a given point in time is equal to which of the following quantities?DisplacementResultant forceAccelerationDistance travelled2Which of the following velocity-time graphs represents the motion of an object at a uniform velocity of 10 m/s.A straight line of positive gradient (one which slopes upwards to the right)A horizontal line along the time (x) axisA straight line of negative gradient (one which slopes downwards to the right)A horizontal line above the time (x) axis3An airplane accelerates uniformly from rest along a runway.  What will a velocity-time graph of its motion look like?A curve of positive increasing gradient (in other words, one which gets steeper as time increases)A straight line which starts above the origin and slopes downwards to the rightA straight line which starts at the origin and slopes upwards to the rightA curve of positive decreasing gradient (in other words, one which gets less steep as time increases)4Cars A and B both start accelerating uniformly from rest at the same time.  The acceleration of car A is 4 metres per second squared, and that of car B is 8 metres per second squared.  Which of the following statements is incorrect?Both graphs will start from the origin (0, 0)The velocity-time graph for the motion of car B will be twice as steep as that of car AThe gradient of the velocity-time graph for the motion of car A will be half that of the velocity-time graph for car BIn a given period of time, car B will travel four times as far as car A5(HT) Which of the following gives the total distance travelled by an object from its velocity-time graph?Its final velocity multiplied by the total time takenThe area between the graph and the time (x) axisThe gradient of the graphNone of the above