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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: | Induced emf Both A and B Both A and C 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 Both A and B Both A and C Electrostatic emf Induced emf |
| 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 |
