Question # 1

The direction of a vector in space requires:

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X-axis

X and Y-axes

XYZ axes

Y and Z-axes

If two forces of magnitudes 3.5 and 2.5 N act on a body such that the angle between the forces is zero, then magnitude of the resultant will be:

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1.0 N

6 N

3.5 N

12 N

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°

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

Which of the following is scalar quantity?

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Electric potential

Velocity

Momentum

Force

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°

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°

An vector of 10 N makes an angle of 45° with x-axis. Angle between its rectangular components with be:

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45°

90°

135°

Zero

A vector which has magnitude 'one' is called:

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Resultant vector

A unit vector

Position vector

None of these

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

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1st Quadrant

2nd Quadrant

3rd Quadrant

4th Quadrant

A person starts his journey from a point 0, travels 4 Km SW, then 4 Km NW, and finally 4 Km north-east. At what distance is he now from point 0?

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0 Km

4 Km

8 Km

12 Km

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

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-,+

+,-

+,+

-,-

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

Cosine of an angle is positive in:

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2nd quadrant

3rd quadrant

4th quadrant

All of these

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

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

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

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