For a linear resistor obeying Ohm's Law (V=IR), the relationship between current (I) and voltage (V) is linear. On a graph with Current (I) on the Y-axis and Voltage (V) on the X-axis, the slope of the line represents I/V. According to Ohm's Law, V/I = R, so I/V = 1/R. Therefore, the slope of the I-V graph is inversely proportional to the resistance (Slope = 1/R).
The graphs between current (I) and voltage (V) for three linear resistors 1, 2 and 3 are given below : If R₁, R₂, and R₃ are the resistances of these resistors, then which one of the following is correct?
Asked in UPSC NDA 2 2018 · Topic: Electric Current (Ohm's Law, resistance, resistivity, and conductivity)
More Physics questions
- Which one of the following statements regarding Ohm's law is not correct ?
- When the short circuit condition occurs, the current in the circuit
- The potential difference between the two end terminals of an electric heater is 220 V and the current through it is 0·5 A. What would be the current through the heater if the potential difference across the terminals of the heater is reduced to 120 V ?
- In which one among the following situations, the bulb would glow the most ? (Consider all batteries are the same)
- - Comparing the voltage across the bulb in each case: (a) V, (b) 2V, (c) V, (d) V/2. - Since the power dissipated (and thus brightness) is proportional to V², the bulb will glow brightest when the voltage across it is highest, which is in case (b) with two batteries in series (2V). 242. For an electric circuit given below, the correct combination of voltage (V) and current (I) is
- The AC mains domestic supply current in India changes direction in every
- The work done in moving a positive charge on an equipotential surface is (i) Finite (ii) Positive (iii) Negative (iv) Zero
- What happens when some charge is placed on a soap bubble?