a. Calculate the potential difference V, - Va due to the infinite rod of uniform charge density A, as shown below. Perform this calculation by directly integrating the electric field over a path between a and b. b. Calculate the potential difference V, – Va due to the rod of length L and uniform charge density A, as shown below. Perform this calculation by calculating V, and V, directly from the charge distribution and subtracting. b: -L/2 L/2→ c. Show that your answer to part b matches your answer to part a in the limit L → 00.

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Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.