ECAT Physics Online Test With Answers

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ECAT Physics Online Test

Sr. # Questions Answers Choice
1 During the upward motion of the projectile, the vertical component of velocity. Decreases Increases Remains constant None of these
2 If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as: Force Energy work impulse
3 Change in momentum is one second called. Impulse Force Energy Work
4 The collision in which KE is conserved but momentum is not conserved is called: Elastic collision Inelastic collision any these None of these
5 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
6 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
7 Acceleration in a body is always produced in the directin of: Velocity Weight Force Botha B and C
8 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
9 The path followed by the projectile is known as: Cycle Hyperbola Trajectory Route
10 During the upward motion of the projectile, the vertical component of velocity: Decreases Increases Remains constant None of these
11 Change in momentum is one second is called: Impulse Force Energy Work
12 Which quantity has the same dimension as that of impulse? KE Power Momentum Work
13 The product of force and time is called change in: Momentum Impulse Force Both a and b
14 Newton's first law is also called: Law of torque Law of force Law of inertia None of these
15 Acceleration in a body is always produced in the direction of : Velocity Weight Force Both B and C
16 If the acceleration of a body is not uniform, then velocity-time graph will be: Curve Straight line Sphere All of these
17 If the acceleration of a body is negative, then slope of the velocity-time graph will be: Zero Positive Negative Infinity
18 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
19 When the total displacement is divided by total time taken, we get: Velocity Average speed Average velocity None of these
20 The decrease in velocity per unit time is called: Variable Acceleration Average Acceleration Retardation None of these
21 The distance covered by a body in unit time is called. Displacement speed Velocity Both B and C
22 Three quarks make: An electron A meson A baryon A photon None of these
23 A pair of quark and antiquark makes a: Meson Baryon Proton Neutron None of these
24 Which are not the elementary particles? Photons Leptons Hadrons Quarks None of these
25 U-238 present in the natural uranium is about: 59% 0.007% 99% 39% 19%
26 Heavy water is made of one oxygen atom and two atoms of: Protium Deuterium Tritium Any of these None of these
27 Examples of moderators used in a fission reactor is/are: Water Heavy water Carbon Hydrocarbon All of these
28 There is present in paraffin a large amount of: Nitrogen Hydrogen Carbon Baryllium Lithium
29 A mass difference of 0.0012 u is equivalent to and energy of: 0.5 Me V 1.13 MeV 5.13 MeV 1.13 keV 1.13 eV
30 In his experiment on nuclear reactions, Rutherford bombardedα particles on: Nitrogen Hydrogen Lead Oxygen Krypton
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