ECAT Pre General Science Online Test With Answers

image
image
image

ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 At the top of the trajectory of a projectile the acceleration is The maximum The minimum Zero g
2 Which of the following four statements is false? A body can have zero velocity and still be accelerated A body can have a constant velocity and still have a varying speed A body can have a constant speed and still have a varying velocity The direction of the velocity of a body can change when its acceleration is constant
3 A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about 80 m 20 m 160 m 40 m
4 What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey? 4 : 5 7 : 9 16 : 25 1 : 1
5 A train of 150 m length is going towards north direction at a speed of 10 ms-1. A parrot files at a speed of 5 ms-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to 12 s 8 s 15 s 10 s
6 The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude, then their magnitudes are 3, 15 4, 14 5, 13 6, 12
7 A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be 40 km/h 48 km/h 50 km/h 60 km/h
8 In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is 8 4 6 7
9 To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined Parallel Antiparallel At angle 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> Perpendicular to each other
10 In Bernoulli's theorem the relation between velocity and pressure is Inverse Direct None of the above Both a and b
11 In the case of an incompressible fluid in stead flow the net rate of flow of mass entering one end of the tube of flow is equal to the net rate of flow of mass leaving the other end. This equation is called Quadratic equation Equation of discontinuity Equation of continuity None of the above
12 The smooth or steady stream-line flow is know as Laminar flow Turbulent flow Both a and b None of the above
13 With the increase of temperature viscosity Increase Decrease Remains same Doubles
14 A P-N juction or semiconductor diode cannot be used as A rectifier Detector Oscillator An amplifier
15 The substances whose resistance decreases with the increase in temperature these substances have coefficient of positive temperature negative temperature absolute temperature zero temperature
16 In the phenomenon of hysteresis magnetism leads the magnetising current magnetism lags behind the magnetising current meganetism goes along the magnetising current none of them
17 The curie temperature of iron is about 250<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 500<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 750<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1000<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
18 Above the curie temperature, iron becomes ferromagnetic paramagnetic diamagnetic any one of them
19 Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as critical temperature curie temperature high temperature fixed temperature
20 Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as ON switch off switch function switch none of these
21 Which of these is not a radiation detector Wilson cloud chamber cyclotron acceleration Geiger Miller counter solid state detector
22 When a charged particle passes through matter, it produces ionization, this effect is used in fission reaction reactor radiation detector fusion reaction
23 Radiation detector are used to measure intensity of radiation measure energy of radiation difference between different types of radiation all the above
24 Pair production take place when energy ofγ-rays photon is equal to 1.02 Mev- greater than 1.02 Mev less than 1.02 Mev none of these
25 γ-rays behave like a particle because they explain the Compton effect Photoelectric effect Pair-production all the above
26 γ-rays are electrostatic waves electromagnetic waves heavy particles longitudinal waves
27 The penetration power ofβ-particle is zero less than<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;">α-particle</span> equal to<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;">α-particle</span> greater than<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;">α-particle</span>
28 The range ofβ-particle in air is greater than that ofα-particle by 1000 times 100 times 15 times 10 times
29 β-particles are easily deflected by collisions than heavy <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;">α-particles</span> <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;">β-particles</span> <span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;">γ-particles</span> none of these
30 How much time, theα-particle more massive than an electron 600 7000 5000 15000
Download This Set
×