Question # 1

O (0,0)is called:

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Position vector

Free vector

Unite vector

Null vector

The magnitude of vector a=i-3j+5k is:

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3

√35

√17

√35

If c = 2i+j+k and d= -1 + 4j +2k, then [c-d]=

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√7

√41

√19

√(2&7)

If u = xi + yj, then|u|

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x² + y²

(x² +y²)²

x²-y²

√(x²+y²)

If aand bare two vectors then a+b =

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b + a

b - a

ab

a^ b

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

The angle between the vectors u = [-3 , 5] and v = [6 , -2] is:

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π/2

-3π/2

π

None of these

Vector additon is:

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Commutative

Associative

Commutative and Associative

None of these

The vector k = [0,0,1] is called unit vector along:

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x -axis

y - axis

z- axis

None of these

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 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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