Which of the following devices relies on the heating effect of electric current? MCQ with Answer and Explanation
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Question #1
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The specific heat capacity of water is exceptionally high. This property is primarily responsible for:
Correct Answer: Option B
Explanation:
Water has a specific heat capacity of 4184 J/kg·K, which is very high. This means it heats up and cools down much more slowly than land. During the day, land heats faster than the sea, causing air above it to rise and cool air from the sea to rush in (sea breeze). The reverse happens at night (land breeze).
Water has a specific heat capacity of 4184 J/kg·K, which is very high. This means it heats up and cools down much more slowly than land. During the day, land heats faster than the sea, causing air above it to rise and cool air from the sea to rush in (sea breeze). The reverse happens at night (land breeze).
Question #2
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A 50 kg person climbs 30 steps each 15 cm high in 10 s. Power (g=10) is
Question #3
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A bullet of mass 10 g moving at 300 m/s penetrates 10 cm into a wooden block. Average resistive force is
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