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

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

Sr. # Questions Answers Choice
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: 45<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 315<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 135<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 225<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span>
2 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: 1.0 N 6 N 3.5 N 12 N
3 The magnitude of resultant of three vectors is 3. Its x-component is one, y-component is two, then its z-component is: 0 1 2 3
4 The resultant of two velocities 3 m/sec and 400 cm/sec making an angle 90° with each other is: 20 m/sec 5 m/sec 3 m.sec None of these
5 A force of 5 n is acting Y-axis. Its component along X-axis is: 7 N 5 N Zero 10 N
6 Cosine of an angle is positive in: 2nd quadrant 3rd quadrant 4th quadrant All of these
7 The magnitude of the resultant of two forces may be increased by: Increasing the angle between them Decreasing the angle between them Drawing a triangle to represent them None of these
8 The vector in space has: One component Two components Three components None of these
9 Which of the following is scalar quantity? Electric potential Velocity Momentum Force
10 All trigonometric functions (sine, cosine, tangent etc) are positive in: 1st quadrant 2nd quadrant 3rd quadrant 4th quadrant
11 Two forces each of the magnitude F act perpendicular to each other. The angle made by the resultant force with the horizontal will be: 30<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 45<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 60<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 90<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span>
12 Two forces of 10 N and 8 N are applied simultaneously to a body. the maximum value of their resultant is: 2 N - 2 N 18 N 36 N
13 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: 20 N 13.66 N 10 N 8.66 N
14 When a vector is multiplied by a negative number, its direction: Remains the same Changes Changes by 180<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> None of these
15 An vector of 10 N makes an angle of 45° with x-axis. Angle between its rectangular components with be: 45<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 90<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 135<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> Zero
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