# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 115 - 120 of 2184

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## Passage

A = 2i + j + k and B = i + j + k are two vectors.

## Question number: 115 (2 of 3 Based on Passage) Show Passage

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

the unit vector perpendicular to A is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 116 (3 of 3 Based on Passage) Show Passage

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

the unit vector perpendicular to B is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 117

» Kinematics » Scalars and Vectors » Vector Addition and Subtraction

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MCQ▾

### Question

A boat is moving with a velocity 3i + 4j with respect to ground. The water in the river is moving with a velocity – 3i – 4j with respect to ground. The relative velocity of the boat with respect to water is

### Choices

Choice (4) Response

a.

8

b.

-6 - 8

c.

5 -

d.

6 + 8

## Question number: 118

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

The three vectors A = 3i-2j + k, B = i-3j + 5k and C = 2i + j-4k form

### Choices

Choice (4) Response

a.

an equilateral triangle

b.

a right angled triangle

c.

no triangle

d.

isosceles triangle

## Question number: 119

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MCQ▾

### Question

The speed of a boat is 5km/h in still water. It crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water is

### Choices

Choice (4) Response

a.

3 km/h

b.

4 km/h

c.

1 km/h

d.

5 km/h

## Question number: 120

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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MCQ▾

### Question

If for two vectors A and B, A x B = 0, which of the following is not correct?

(1) They are perpendicular to each other

(2) They act at an angle of 60°

(3) They act at an angle of 30°

(4) They are parallel to each other

### Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct