Question # 1

All trigonometric functions (since, cosine tangent etc. ) are positive in:

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1st Quadrant

2nd Quadrant

3rd Quadrant

4th Quadrant

The vector in space has:

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One component

Two components

Three components

None of these

Tick the correct answer:

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Torque is a vector quantity

Torque is the turning effect of a force

Torque is called moment of a force

All of above

The rectangular components of a vector are equal in magnitude when the vector makes and angle _______with their x-component:

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0°

30°

45°

60°

For measuring the angle between two vectors graphically, we join:

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Tails of both the vectors

Tail of one vector with the head of other

Heads of both the vectors

None of these

Scalar product is also called:

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Cross product

Dot product

Product scalar

Product vector

The resultant of two velocities 3 m/sec and 400 cm/sec making an angle 90° with each other is:

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20 m/sec

5 m/sec

3 m.sec

None of these

Two forces of 10N and 8N are applied simultaneously to a body. The maximum value of their resultant is:

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20 N

-2 N

18 N

36 N

The perpendicular distance from the axis of rotation to the line of action of force is called:

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Moment arm

Moment of a force

Torque

Non of these

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

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Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

Unit vector is used to specify:

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Magnitude of a vector

Dimensions of a vector

Direction of a vector

Position of a vector

When the magnitude of two component vectors are equal to that of their resultant, then the angle between the components is:

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60°

90°

120°

150°

If a vector lies in second quadrant, than B_xand B_yare:

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-,+

+,-

+,+

-,-

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ECAT Pre General Science Physics Chapter 2 Vectors and Equilibrium Online Test MCQs With Answers

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