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02-20-2008, 08:43 PM
Q.1 Four point charges are placed at the four corners of a square in the two ways (i) and (ii) as shown below. Will the (i) electric field (ii) Electric potential, at the centre of the square, be the same or different in the two configurations and why?
(2 marks)
Q.2 The two graphs drawn below, show the variation of electrostatic potential V with 1/r, r being the distance of the field point from the point charge, for two point charges q3 and q4.
(i) What are the signs of the two charges?
(ii) Which of the two charges has a larger magnitude and why?
(2 Marks)
Q.3 An electrical element X, when connected to an alternating voltage source, has the current through it leading the voltage by ?/2 (pie/2) radii. Sketch a graph showing the variation in opposition offered by it to the current with the frequency of the applied voltage.
(1 Mark)
(2 marks)
Q.2 The two graphs drawn below, show the variation of electrostatic potential V with 1/r, r being the distance of the field point from the point charge, for two point charges q3 and q4.
(i) What are the signs of the two charges?
(ii) Which of the two charges has a larger magnitude and why?
(2 Marks)
Q.3 An electrical element X, when connected to an alternating voltage source, has the current through it leading the voltage by ?/2 (pie/2) radii. Sketch a graph showing the variation in opposition offered by it to the current with the frequency of the applied voltage.
(1 Mark)