Heat transfer in liquids and gases mainly occurs by MCQ with Answer and Explanation
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Question #1
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The SI unit of charge is
Question #2
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A boy is sitting on a rotating chair with his arms folded. If he suddenly extends his arms, what will happen to his angular velocity?
Correct Answer: Option A
Explanation:
This is based on the conservation of angular momentum (L = Iω), where 'I' is the moment of inertia and 'ω' is angular velocity. When the boy extends his arms, mass moves further from the axis of rotation, increasing his moment of inertia (I). Since 'L' is conserved, an increase in 'I' must result in a decrease in angular velocity (ω).
This is based on the conservation of angular momentum (L = Iω), where 'I' is the moment of inertia and 'ω' is angular velocity. When the boy extends his arms, mass moves further from the axis of rotation, increasing his moment of inertia (I). Since 'L' is conserved, an increase in 'I' must result in a decrease in angular velocity (ω).
Question #3
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If the momentum of a body is doubled, its kinetic energy becomes
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