The instrument that measures the density of a liquid is MCQ with Answer and Explanation
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Question #1
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Microwave oven heats food by
Question #2
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The phenomenon of electromagnetic induction was discovered by:
Correct Answer: Option B
Explanation:
Michael Faraday discovered electromagnetic induction in 1831. He demonstrated that a changing magnetic field could induce an electric current in a nearby circuit. This groundbreaking discovery laid the foundation for all modern electric generators and transformers. Tesla contributed to AC systems, Edison to DC systems, and Hertz proved the existence of radio waves.
Michael Faraday discovered electromagnetic induction in 1831. He demonstrated that a changing magnetic field could induce an electric current in a nearby circuit. This groundbreaking discovery laid the foundation for all modern electric generators and transformers. Tesla contributed to AC systems, Edison to DC systems, and Hertz proved the existence of radio waves.
Question #3
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Hydraulic brakes used in automobiles operate on the basis of:
Correct Answer: Option D
Explanation:
Hydraulic brakes operate on Pascal's Law. It states that an external pressure applied to an enclosed, incompressible fluid is transmitted undiminished equally in all directions throughout the fluid volume. When force is applied to the small brake pedal cylinder, it exerts a large pressure that is transmitted to the larger wheel cylinders, amplifying the force.
Hydraulic brakes operate on Pascal's Law. It states that an external pressure applied to an enclosed, incompressible fluid is transmitted undiminished equally in all directions throughout the fluid volume. When force is applied to the small brake pedal cylinder, it exerts a large pressure that is transmitted to the larger wheel cylinders, amplifying the force.
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