A current of 5 A flows through a 10 Ω resistor for 2 minutes. Heat produced in kJ is MCQ with Answer and Explanation
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Question #1
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Which of the following is not a transverse wave?
Question #2
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Latent heat of fusion ice = 336 kJ/kg. Heat to melt 3 kg ice at 0°C:
Question #3
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When a source of sound moves faster than the speed of sound itself in that medium, it creates a conical wave front known as a:
Correct Answer: Option C
Explanation:
When an object (like a jet plane) exceeds the speed of sound (Mach 1), it overtakes the sound waves it produces. These sound waves pile up behind the object, superimposing constructively to form an intense, cone-shaped pressure wave called a shock wave. When this high-pressure cone sweeps over an observer on the ground, they hear a loud 'sonic boom'.
When an object (like a jet plane) exceeds the speed of sound (Mach 1), it overtakes the sound waves it produces. These sound waves pile up behind the object, superimposing constructively to form an intense, cone-shaped pressure wave called a shock wave. When this high-pressure cone sweeps over an observer on the ground, they hear a loud 'sonic boom'.
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