Question # 1

The modulus of a vector i-i+ k is:

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√3

1

√2

∞

If u = xi + yj, then|u|

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x² + y²

(x² +y²)²

x²-y²

√(x²+y²)

a ______quantity is one that possesses both magnitude and direction.

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Scalar

Vector

Segment

None of these

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

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0

1

-1

3

If a=5j + 2j,b=2i -3j, then|a+2b|=

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√21

√97

√39

None of these

Vector additon is:

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Commutative

Associative

Commutative and Associative

None of these

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 u =[3,-4],then modulus of uis:

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5

5i

-5

√5

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 m and n be two scalars, then (m+n) g =

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0

m+n

m▁a+n▁a

ma - m▁a

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ECAT Mathematics Chapter 23 Pre Engineering Online Test MCQs With Answers

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