Question
Which of the following devices can be used to detect
radiant heat?Solution
Based on the thermoelectric effect, the thermopile can be used as a heat sensor to measure thermal radiation. A thermopile is made of thermocouple junction pairs connected electrically in series. Thermocouples near the ground measures radiant energy.
Pipes ‘A’ and ‘B’ together can fill a tank in 18 hours, while pipe ‘B’ alone can fill it in 36 hours. If pipe ‘C’ takes 12 hours less th...
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The efficiencies of two inlet pipes, 'P' and 'Q', are in the ratio of 3:5, respectively. When both pipes are open together, the tank is filled in 16 hou...
Pipes 'E' and 'F' can fill a tank in 20 and 25 minutes respectively. Both are opened together. A leak develops after half of the tank is filled, which r...
Pipe ‘A’ fills a tank in 16 hours. Pipe ‘B’ empties the same in 32 hours. If both are opened together, how much time will it take to fill 50% o...
The time taken by pipe B3 alone to fill an empty tank completely is half of the time taken by pipe B1 alone to fill the same tank completely. Pipe B2 al...
