Ohm's Law

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Ohm's Law: Overview

This topic covers concepts, such as, Ohm's Law, Resistance,V-I Graph and Ohmic Resistance etc.

Important Questions on Ohm's Law

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The critical temperature for superconductors is the temperature at which the electrical resistivity of a metal

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What are the factors that affects resistance?

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The example of non ohmic resistance is _____ .

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What happens to the resistance if the area of cross section of wire is tripled?

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Describe resistance of a conductor.

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A copper wire has diameter 0.5 mm and resistivity of 1.6×10-8 Ω m. What will be the length of this wire to make its resistance 10 Ω?

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A wire of given material having length l and area of cross-section A has a resistance of 4 Ω. What would be the resistance of another wire of the same material having length l/2 and area of cross-section 2A?

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What happens to the resistance of a wire when its length is doubled?

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Which among the following graphs correctly represents ohms law?

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Resistivity depends on which of the following?

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Electrical resistivity of a given metallic wire depends upon:

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Slope of the graph drawn in between resistance of a wire(R) and its length (L) is :

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In an electric circuit, a device called rheostat is often used to change the _____ in the circuit.

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If the potential difference across the two ends of a conductor is 1 V and the current through it is 1 A, then the resistance R, of the conductor is :

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The resistivity does not change if :

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A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2, R3 respectively. Which of the following is true?

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