The walls of a closed cubical box of edge 40 cm are made of a material of thickness 1 mm and thermal conductivity 4 x 10-4 cal s-1 cm-1°C-1. The interior of the box is maintained 100°C above the outside temperature by a heater placed inside the box and connected across 400 V d.c. Calculate the resistance of the heater.
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Answer:
4_10 equal to 500 is the answer for this help you
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Explanation:
The walls of a closed cubical box of edge
are made of a material of thickness
and thermal conductivity
. The interior of the box is maintained at
above the outside temperature by a heater placed inside the box and connected across
. Calculate the resistance of the heater.
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