Question # 1

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Unit vector

Null vector

Free vector

None of these

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0

2

3

1

i.(j.k) =

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Meaningless

-1

1

2

Which of the following is a vector quantity ?

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Work

Temperature

Distance

Displacement

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2 - 7

2 + 7

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Position vector

Null vector

Unit vector

None of these

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90°

30°

60°

0°

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0

1

-1

2

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x - axis

z - axis

y - axis

None of these

A null vector is defined as a vector whose magnitude is:

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1

2

0

None of these

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3

4

5

6

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Unit Vector

Null vector

Position vector

None of these

Two vectors are equal if they:

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Pass through the same point

Are parallel to each other

Are parallel to each other and have same direction

Have equal magnitude and have same direction

If 2 and 2 are x and y-components of a vector, then its angle with x-axis is:

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30°

45°

60°

90°

Zero vector is perpendicular to:

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Every vector

Unit vector only

Position vector only

Not any vector

The law of parallelogram of addition was used by Aristotle to describe the combined action of :

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One force

Two forces

Three forces

Four forces

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60°

90°

30°

45°

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28

29

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Free vector

Unit vector

Null vector

None of these

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0

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