AP (Advanced Placement) Physics(B-C): Questions 110 - 113 of 921

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Question number: 110

» Torque and Equilibrium

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MCQ▾

Question

Two laboratory masses hang from the uniform meter stick in the illustration: a mass of at the mark and a mass of at the mark. The meter stick balances horizontally on a pivot placed at the mark. What is the mass of the meter stick?

Uniform meter stick

Uniform Meter Stick

Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

Question number: 111

» Electrostatics

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MCQ▾

Question

The theoretical distance of an electron (in its ground state) from the proton nucleus of a hydrogen atom is called the Bohr radius, which is approximately . What is the electric force of the proton on the electron at this distance?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

Question number: 112

» Force and Newton's Law of Motion

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MCQ▾

Question

Let the radius of Earth is and a satellite of mass , is inserted into an orbit at a position above Earth’s surface. What is the approximate “weight” of the satellite at this position?

(Take: acceleration due to gravity at the surface of the earth )

Choices

Choice (5)Response

a.

b.

c.

d.

e.

All of the above

Question number: 113

» Electrostatics

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MCQ▾

Question

A hollow conductive sphere has a net positive charge . Two Gaussian surfaces are defined as follows:

a spherical Gaussian surface enclosing outside the sphere, and

a spherical Gaussian surface just inside the surface of the sphere.

What is the enclosed charge calculated for each defined Gaussian surface?

Choices

Choice (5)Response

a.

Zero for surface and for surface

b.

for surface and zero for surface

c.

Zero for surface and zero for surface

d.

for surface and for surface

e.

All of the above

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