AP (Advanced Placement) Physics(B-C): Questions 659 - 663 of 921

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Question number: 659

» Magnetic Field & Electromagnetism

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MCQ▾

Question

Two short magnets with their axes horizontal and perpendicular to the magnetic meridian are placed with their centers east and west of magnetic needle. If the needle remains undeflected, the ratio of their magnetic moments is

Choices

Choice (5)Response

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1

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All of the above

Question number: 660

» Thermodynamics

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Question

Apparatus that liquefies helium is in a laboratory at . The helium in the apparatus is at . If of heat is transferred from the helium, What is the minimum amount of heat delivered to the laboratory?

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Choice (5)Response

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All of the above

Question number: 661

» Atomic & Nuclear Physics

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Question

If the work function of a metal is , then what is the threshold wavelength for the ejection of photoelectrons from this metal?

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Choice (5)Response

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None of the above

Question number: 662

» Atomic & Nuclear Physics

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Question

If the ground state energy of electron in Bohr’s model is , then how much energy emitted with photon during transition to ?

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Question does not provide sufficient data or is vague

Question number: 663

» Torque and Equilibrium

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MCQ▾

Question

A meter rod in the figure has a mass of . With a laboratory mass hanging from the top end, the meter rod remains stable against a frictionless wall with its bottom end from the base of the wall. What is the friction force exerted on the rod by the floor?

A meter stick with 5 kg mass

A Meter Stick with 5 Kg Mass

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Choice (5)Response

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b.

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None of the above

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