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A bulb is made using two filaments. A switch selects whether the filaments are used individually or in parallel. When used with a 15 V battery, the bulb can be operated at 5 W, 10 W or 15 W. What should be the resistances of ...
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I am stuck up with another question. During ice-skating,why are no tracks left behind after the skier passes? Anyone care to help me out? Thanks in advance. I need it urgently,as my exam is on Tuesday. ...
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Two swimmers leave point A on one bank of a river to reach point B on the other bank. One of the swimmers swims along straight line AB while the other swims perpendicular to the direction of flow of the stream and walks the d ...
