ECAT Pre General Science Online Test With Answers

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ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 Physics is one of the branches of: Social sciences Physical sciences Biological sciences Abstract art
2 Branch of physics which deals with the study of stars and galaxies is called: Solid state physics Astrophysics Molecular physics Chemical physics
3 Silicon can be obtained from: Lead Uranium An isotope of oxygen Sand
4 Particles have the mass smallest of following is: Electron Proton Neutron Quark
5 The machines which deals with the objects moving with velocities approaching that of light is called: Relativistic mechanics Wave mechanics Quantum Statics mechanics
6 Astrophysics is a branch of physics, which deals with: Sub-atomic particles Stars and galaxies Light and sound Music
7 The information from far side of the universe are gathered by: Radio telescope Microscope Telescope Spectro scope
8 The study of physics involves? Structure of space and time Interaction of electromagnetic radiation with matter Both of them Chemical changes None of them
9 The quantity having dimension of ML2T02will earth is: 80 sec 500 sec 1.802 X 10<sup>4</sup>sec Aerophysics
10 Which quantity has different dimension: Work Pressure Energy Torque
11 Addition of 2.189 kg, 11.8 kg and 5.32 kg gives the rounded off answer as: 19.398 19.400 19.4 19.3
12 Significant figures in 0.0010 are: Four Three Two One
13 Which one is the least multiple: Pico Femto Nano Atto
14 1 gm-cm-3is equal to: 10<sup>3</sup>kg-m<sup>-3</sup> 10<sup>-3</sup>kg-m<sup>-3</sup> 1 kg-m<sup>-3</sup> 10<sup>6</sup>kg-m<sup>-1</sup>
15 Light year is a unit of: Time Distance Velocity Intensity of light
16 When a conductoris moved across a magnetic field: Emf induced its similar to that of a battery Emf induced gives rise to induced current An emf is induced across its ends All are correct None of these
17 In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called: Both A and C Induced emf Both A and B Motion emf Electrostatic emf
18 In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called: Motion emf Electrostatic emf Induced emf Both A and B Both A and C
19 When a conductor is moved across a magnetic field, the redistribution of charge sets up: Magnetic field Electrostatic field Electromagnetic field All of these None of these
20 When a conductor moved with its length parallel to the lines of magnetic fled: An emf is induced across its ends Emf induced is similar to that of a battery Emf passes through the conductor Both A and B None of these
21 The product of induced current and the resistance of the wire through which the current is passing is called: Electromagnetic induction induced emf Induced current Self induced None of these
22 The unit of induced emf is: Volt Nm/As Joule coul<sup>-1</sup> Both A and C All of these
23 Referring to above figure, a changing current in coil P can be produced: At the instant the switch is closed At the instant the switch is opened With the help of rheostat All of these None of these
24 Referring to above figure, due to change in current in the coil P, the change in magnetic flux: Is associated with coil P Is associated with coil S Causes an induced current is coil S All of these None of these
25 Referring to above figure, current in coil P falls from its maximum value to zero: At the instant the switch is closed At the instant the switch is opened When switch is kept open When switch is kept closed None of these
26 Referring to above figure, current in the coil P grows from zero to its maximum value: At the instant the switch is closed At the instant the switch is opened When switch is kept open All of above Neither of above
27 A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when: The coil is distorted The coil is rotated The coil is neither distorted nor rotated Both A and B None of these
28 Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current: Of same magnitude in the same direction Of different magnitude in the same direction Of same magnitude but in opposite direction Of different magnitude in the opposite direction None of these
29 When there is no relative motion between the magnet and coil, the galvanometer indicates: No current in circuit An increasing current A decreasing current Either B or C
30
The magnitude of induced emf depends upon the:		 Rate of decrease of magnetic field Rate of change of magnetic field Rate of increase of magnetic flux Constancy of magnetic field None of these
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