The resistance of a metal conductor increases with temperature due to

increase in the rate of collisions between the current carriers and the vibrating atoms of the conductor

change in the dimensions of the conductor

increase in the number of collisions among the current carriers

increase in the rate of collisions between the current carriers and the vibrating atoms of the conductor

Given a current carrying wire of non-uniform cross-section. Which of the following is constant throughout the length of the wire?

Current, electric field and drift speed

increase in the rate of collisions between the current carriers and the vibrating atoms of the conductor

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