# AP (Advanced Placement) Physics(B-C): Questions 9 - 12 of 921

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## Question number: 9

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MCQ▾

### Question

A metal sphere with a charge of comes into contact with a metal sphere of identical size that has a charge of . The spheres are then separated. What are the charges on the spheres after they are separated?

### Choices

Choice (5)Response

a.

Each sphere has a charge of .

b.

Each sphere retains its original charge.

c.

Two spheres have zero net charge.

d.

Each sphere has a charge of .

e.

Question does not provide sufficient data or is vague

## Question number: 10

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MCQ▾

### Question

At a distance of from Earth’s center, the acceleration due to gravity is about . What is the closest estimate of the acceleration due to gravity at a point from Earth’s center?

### Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

## Question number: 11

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MCQ▾

### Question

Three objects are positioned along a line. Each has a mass of and an x coordinate as shown in the illustration. Which of the following is true for net gravitational force on one due to the other two objects?

### Choices

Choice (5)Response

a.

b.

c.

d.

e.

All of the above

## Question number: 12

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MCQ▾

### Question

In figure, three positive charges of equal magnitude are placed at vertices of an equilateral triangle. At which point the electrostatic potentials due to each three charges are same?

### Choices

Choice (5)Response

a.

Midpoint of side of triangle

b.

At point of charge

c.

Everywhere in triangle

d.

Orthocenter of triangle

e.

All of the above

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