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Physics ECAT Pre Engineering Chapter 2 Vectors and Equilibrium Online Test MCQs With Answers
Question # 1
Two forces each of 10 N act on a body, if the force are inclined at 30
° and 60
° respectively with x-axis, then x-component of their resultant is:
Choose an answer
20 N
13.66 N
10 N
8.66 N
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Question # 2
For measuring the angle between two vectors graphically, we join:
Choose an answer
Tails of both the vectors
Tail of one vector with the head of other
Heads of both the vectors
None of these
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Question # 3
An vector of 10 N makes an angle of 45
° with x-axis. Angle between its rectangular components with be:
Choose an answer
45
°
90
°
135
°
Zero
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Question # 4
The rectangular components of a vector are equal in magnitude when the vector makes and angle _______with their x-component:
Choose an answer
0
°
30
°
45
°
60
°
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Question # 5
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:
Choose an answer
Zero to 3 N
1 N to 13 N
13 N to 3 N
None of these
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Question # 6
Two vectors having different magnitudes:
Choose an answer
Have their directions opposite
May have their resultant zero
Cannot have their resultant zero
None of these
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Question # 7
Two forces each of the magnitude F act perpendicular to each other. The angle made by the resultant force with the horizontal will be:
Choose an answer
30
°
45
°
60
°
90
°
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Question # 8
Two forces of 10N and 8N are applied simultaneously to a body. The maximum value of their resultant is:
Choose an answer
20 N
-2 N
18 N
36 N
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Question # 9
When a vector is multiplied by a negative number, its direction:
Choose an answer
Remains the same
Changes
Changes by 180
°
None of these
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Question # 10
The driection of vector si space is specified by:
Choose an answer
One angle
Two angles
Three angles
None of above
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Question # 11
The resultant of two velocities 3 m/sec and 400 cm/sec making an angle 90
° with each other is:
Choose an answer
20 m/sec
5 m/sec
3 m.sec
None of these
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Question # 12
The sum of two or more vectors is equal to a single vector which is called:
Choose an answer
Component vector
Resultant vector
Product vector
None of these
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Question # 13
All trigonometric functions (since, cosine tangent etc. ) are positive in:
Choose an answer
1st Quadrant
2nd Quadrant
3rd Quadrant
4th Quadrant
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Question # 14
Parallel vectors of same magnitudes:
Choose an answer
Are equal
Are unequal
When added give the some equal to zero
Give the answer equal to zero
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Question # 15
If x-component of a vector is -3 N and y-component is 3 N, then angle of resultant vector will x-axis is:
Choose an answer
45
°
315
°
135
°
225
°
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