ECAT Pre General Science Online Test With Answers

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ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 Cosine of an angle is positive in: 2nd quadrant 3rd quadrant 4th quadrant All of these
2 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
3 The vector in space has: One component Two components Three components None of these
4 Which of the following is scalar quantity? Electric potential Velocity Momentum Force
5 All trigonometric functions (sine, cosine, tangent etc) are positive in: 1st quadrant 2nd quadrant 3rd quadrant 4th quadrant
6 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>
7 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
8 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
9 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
10 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
11 A vector which has magnitude 'one' is called: Resultant vector A unit vector Position vector None of these
12 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? 0 Km 4 Km 8 Km 12 Km
13 Two vectors to be combined have magnitudes of 60 N and 35 N. Pick the possible answer: 100 N 70 N 20 N Zero
14 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: Zero to 3 N 1 N to 13 N 13 N to 3 N None of these
15 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: Zero to 3 N 1 N to 13 N 13 N to 3 N None of these
16 If the vector 5 N lies along with x-axis, then its component along y-axis will be: Zero 5 N 7 N 10 N
17 The rectangular components of a vector are equal in magnitude when the vector makes and angle _______with their x-component: 0<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> 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>
18 When the magnitude of two component vectors are equal to that of their resultant, then the angle between the components is: 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> 120<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> 150<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>
19 If a vector lies in second quadrant, than Bxand Byare: -,+ +,- +,+ -,-
20 Parallel vectors of same magnitudes: Are equal Are unequal When added give the some equal to zero Give the answer equal to zero
21 The direction of vector in space is specified by: One angle Two angles Three angles None of these
22 The direction of a vector in space requires: X-axis X and Y-axes XYZ axes Y and Z-axes
23 Choose the set of physical quantities, which have both numerical and directional properties: Velocity, mass Speed, acceleration acceleration weight Distance, force
24 The branch of physics which deals with the structure and properties of solids is called: Plasma physics Solid state physics Any of above Astrophysics
25 Density is defined as: Mass per volume Volume per mass Mass X volume Mass per length
26 Examples of physical quantities are: Length Color Effect of music All of these
27 In the equation E=mc2 value of c is? 186000 miles per hour 186000 miles per sec 3 X 10<sup>8</sup>m/sec Both A and C Both B and C
28 From sand, we get a material used for construction of computer chips. That material is called: Copper Lead<div><br></div> Silicon Germanium
29 From sand, we get a material used for construction with the motion of bodies under the action of forces is called: Optics Mechanics Thermodynamics Astrophysics
30 Electron is a particle whose mass is: Greater than that of a proton Smaller than of a proton and greater than mass of neutron Smaller than that of proton or neutron Greater than that of an atom
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