Two parallel wires carrying direct currents in the opposite directions will: MCQ with Answer and Explanation
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Question #1
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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 B
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'.
Question #2
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The instrument used to measure potential difference is
Question #3
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A body of mass m is taken from Earth's surface to a height equal to twice Earth's radius. Change in potential energy is
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