alleryStart learning →A graph of current versus voltage for a circuit is a straight line whose slope is 0.001 A per 1 V. What is the resistance of the circuit?
A0.001 ohm
B100 ohm
C10 ohm
D1000 ohm
Answer & Solution
Correct answer: D. 1000 ohm
1. Ohm's law rearranged as I = V/R shows that a plot of I versus V has slope 1/R.
2. The given slope is 0.001 A per 1 V, so 1/R = 0.001 A/V.
3. Solving for R gives R = 1 V / 0.001 A = 1000 ohm.
4. 0.001 ohm confuses the slope value itself with the resistance rather than its reciprocal.
_Source: OpenStax Physics (CC BY 4.0), Ch 19 "Electrical Circuits", section Determine Resistance from Current-Voltage Graph_
Keep practising Electrical Circuits
Browse all Electrical Circuits questions for HSC (New South Wales), or explore more Physics topics.
Related questions
Three 10 ohm resistors are connected in parallel across a 9.0 V battery. What power is disAn older incandescent light bulb is rated at 60 W and operates at 120 V. What current flowA circuit has 0.12 A flowing through it across a potential drop of 3.0 V. What power is diA resistor of 100 ohm is connected across a 12 V source. What electric power is dissipatedHow is electric power defined in terms of energy?A 45 ohm resistor and a 60 ohm resistor are wired in parallel with each other. What is theIn that same circuit, the blue branch draws 0.80 A and the red branch draws 0.60 A from thA 10 ohm resistor is connected in parallel with a second resistor R, giving a combined equ