1) A tap supplies water at 22°C . A man takes 1 litre per minute at 37°C from the geyser. Show that the power of the geyser is 1050W.
2) A servo stabilizer restricts voltage output to 220V±1 %. If an electric bulb 100W / 220 V is connencted to it, find the max and min power consumed by it.
3) 50V battery is supplying a current of 10 amp when connected to a resistor. If the efficiency of the battery at this current is 25 %, show that the int resistance of the batttery is 3.75 ohm.
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4 Answers
62Osama, please try to name the threads in a relevant way...
1) A tap supplies water at 22°C . A man takes 1 litre per minute at 37°C from the geyser. Show that the power of the geyser is 1050W.
4187 J/kgK
4187*15/60 = 1047 W
60 is to convert the minutes to seconds
112. since V=220+1% v(max)=220+2.2V
R=220*220/100
p(max)=V*V/R
IIly p(min) can be calculated