Question # 1

If x-component of a vector is -3 N and y-component is 3 N, then angle of resultant vector will x-axis is:

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45°

315°

135°

225°

By convention, torques producing clockwise rotation are taken as:

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Positive

Nagative

Zero

None of these

The sum of two or more vectors is equal to a single vector which is called:

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Component vector

Resultant vector

Product vector

None of these

The driection of vector si space is specified by:

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One angle

Two angles

Three angles

None of above

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°

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

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 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

When a vector is multiplied by a negative number, its direction:

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Remains the same

Changes

Changes by 180°

None of these

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

Which of the following is scalar quantity?

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Electric potential

Velocity

Momentum

Force

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

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

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

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