ECAT Pre General Science Online Test With Answers

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ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 The collision in which KE is conserved but momentum is not conserved is called: Elastic collision Inelastic collision any these None of these
2 When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision. Becomes half Becomes zero Ramains same Becomes double
3 If two bodies of equal masses moving in the same direction collide elastically, then their velocities. Are added Are subtracted Do not change Are exchanged
4 Acceleration in a body is always produced in the directin of: Velocity Weight Force Botha B and C
5 A train cover 90 km in half an hour. the time taken by it to travel 15 km will be: 20 minutes 48 minutes 10 minutes 5 minutes
6 The path followed by the projectile is known as: Cycle Hyperbola Trajectory Route
7 During the upward motion of the projectile, the vertical component of velocity: Decreases Increases Remains constant None of these
8 Change in momentum is one second is called: Impulse Force Energy Work
9 Which quantity has the same dimension as that of impulse? KE Power Momentum Work
10 The product of force and time is called change in: Momentum Impulse Force Both a and b
11 Newton's first law is also called: Law of torque Law of force Law of inertia None of these
12 Acceleration in a body is always produced in the direction of : Velocity Weight Force Both B and C
13 If the acceleration of a body is not uniform, then velocity-time graph will be: Curve Straight line Sphere All of these
14 If the acceleration of a body is negative, then slope of the velocity-time graph will be: Zero Positive Negative Infinity
15 Distance covered by a freely failing body n the first second of its motion will be: 4.9 m 9.8 m 19.6 m 29.4 m
16 When the total displacement is divided by total time taken, we get: Velocity Average speed Average velocity None of these
17 The decrease in velocity per unit time is called: Variable Acceleration Average Acceleration Retardation None of these
18 The distance covered by a body in unit time is called. Displacement speed Velocity Both B and C
19 Which quantity has different dimension? Tension Work Energy Torque
20 dimensions are the same for: Work and energy Force and weight None of these Both a and b
21 Dimension of mass is written as: M [M] (M) [m]
22 A dimension stands for the ___________ nature of certain physical quantity. super Quantitative Qualitative Both B and C
23 The maximum possible error in the reading for a meter rod with least count 1 mm is: 0.005 mm 0.05mm 0.5mm 5.0mm
24 The maximum possible error in the reading of an instrument is ______ its least count. Half of Quarter of Equal to Double than
25 For multiplication and division purposes, percentage uncertainties are: Add subtracted Multiplied Divided
26 For addition and subtraction purposes, absolute uncertainties are: Added Subtracted Multipiled Divided
27 Uncertainty is of following type/types: Absolute Fractional Percentage All of these
28 The error may occur due to: Negligence Faulty apparatus Inappropriate method all of these
29 If the absolute uncertainty of an instrument is 0.0a1 cm, then its least count will be : 0.005 cm 0.01 cm 0.02 cm 0.001 cm
30 The definite number of significant figures in 5000 is: Four Three Two One
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