Question
Which of the following is the best conductor of
electricity?Solution
Sea water is a good conductor. It has resistance, and this resistance increases with distance. So, if you dip a very high voltage electric wire into the ocean, the area around it (even up to 100 meters or more, depending on how high the voltage is) becomes electrified.
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A boy can swim in water with a speed of 13 km/hr in still water. If the speed of the stream is 5 km/hr, what will be the time taken by the boy to cover ...
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