# Electrostatics-Coulomb's Law (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 6 - 9 of 9

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## Passage

A sphere of radius R contains charge density ρ (r) = A (R-r), for 0 The total electric charge inside the sphere is Q.

## Question number: 6 (1 of 2 Based on Passage) Show Passage

» Electrostatics » Coulomb's Law

MCQ▾

### Question

If charge q is placed at r (r > R) than it would experience force is,

### Choices

Choice (4) Response

a.

k q Q r

b.

c.

d.

## Question number: 7 (2 of 2 Based on Passage) Show Passage

» Electrostatics » Coulomb's Law

MCQ▾

### Question

The electric field outside the sphere is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 8

» Electrostatics » Coulomb's Law

MCQ▾

### Question

Electric charges of 1μC, -1μC and 2μC are placed in air at the corners A, B and C respectively of an equilateral triangle ABC having length of each side 10 cm. The resultant force on the charge at C is

### Choices

Choice (4) Response

a.

3.6 N

b.

2.7 N

c.

1.8 N

d.

0.9 N

## Question number: 9

» Electrostatics » Coulomb's Law

MCQ▾

### Question

The charges on two spheres are + 7 μ C and -5 μ C respectively. They experience a force F. If each of them is given an additional charge of -2 μ C, the new force of attraction will be

### Choices

Choice (4) Response

a.

F

b.

c.

d.

2F

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