Question # 1

If the sum of two unit vectors is a unit vector the the magnitude of their difference is

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√2

√3

1

None of these

If a≠ , b≠ 0 and|a=b|=|a-b|,then vectors a and b are:

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Parallel to each other

Perpendicular to each other

Inclined at 60^o

neither parallel nor perpendicular

O (0,0)is called:

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Position vector

Free vector

Unite vector

Null vector

Vector i =

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[1,0]

[0,1,0]

[0,0,1]

None of these

I f a =5i + 2j, then|a| =

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√13

√7

1/√13

√29

If G is the centroid of the triangle, then GA +GB+GC=

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0

1

-1

3

If a = 2i +2j, b= 3i -j and c=4i +5j, the 3b -a-2c =

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-i -15j

i-15j

i-3j

None of these

The angle between the vectors u =2i - i + k and v = -i + i is:

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3π/2

2π/3

5π/6

π/3

a ______quantity is one that possesses both magnitude and direction.

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Scalar

Vector

Segment

None of these

The modulus of 12-5i is:

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7

13

√7

119

The positive real number which is the measure of the length of a vector is called the

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Unit vector

Modulus

Inverse

None of these

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ECAT Mathematics Chapter 23 Pre Engineering Online Test MCQs With Answers

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