ECAT Physics Online Test With Answers

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ECAT Physics Online Test

Sr. # Questions Answers Choice
1 The consumption of energy by a 1000 watt heter in half an hour is: 5 Kwh 0.5 Kwh 2.5 Kwh 3.2 Kwh
2 One KWh is equal to: 3.6 x 10<sup>2</sup>J 3.6 KJ 3.6 x 10<sup>1</sup>KJ 3.6 MJ
3 The velocity given to a body to go out of the influence of earth's gravity is known as: Terminal velocity Orbital velocity Escape velocity None of these
4 When two protons are brought closer potential energy of both of them: Increases Decreases Remains same None of these
5 A body of weight 1 N has a kinetic energy of 1 joule when its speed is: 1.46 m sec<sup>-1</sup> 2.44 m sec<sup>-1</sup> 3.42 m sec<sup>-1</sup> 4.43 m sec<sup>-1</sup>
6 Tick the conservation force: Tension in a string Air resistance string Elastic spring force Frictional force
7 Work done along a closed path in a gravitational field is: Maximum Minimum Zero Unity
8 A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s One coulomb 0.5 coulomb 30 coulombs 2 coulombs None of these
9 The conventional current is the name given to current due to flow of Positrons Positive charges Negative charges Both A and C None of these
10 In case of metallic conductors, the charge carriers are Protons Electrons Antiprotons Positrons Both A and B
11 Field lines are closer to each other in the region where the filed is Stronger Weaker Much weaker Absent None of these
12 Electric field lines emerge from the charges in One dimension Two dimensions Three dimensions Four dimensions None of these
13 The value of relative permittivity of different dielectrics are Equal Different Greater than one Smaller than one Both B and C
14 By placing a dielectric in between the charges, the electrostatic force between them Is always reduced Is always increased Is not affected Is increased one million times None of these
15 Electric lines of force Intersect each other Are always parallel Are always anti-parallel Never intersect None of these
16 The electric field lines start from Positive charge Negative charge Either A or B Neutron An atom
17 The SI unit of charge is Ampere Watt Coulomb Volt Joule
18 The intensity at a point due to a charge is inversely proportional to Amount of charge Size of the charge Distance between charge and the point Square of the distance from the charge None of these
19 Electric intensity at a place due to a charged conductor is a Scalar quantity Vector quantity Semi vector and semi scalar Dimensionless quantity Both A and D are true
20 Electric field strength is defined as Work done on unit charge Force exerted on unit charge Distance covered by unit charge Power exerted by unit charge None of these
21 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 and induced current in coil S All of these None of these
22 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
23 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
24 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
25 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
26 When there is no relative motion between the magnet and coil, the galvanometer indicated No current in the circuit An increasing current A decreasing current A constant current Either B or C
27 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
28 Michael Faraday and Joseph Henry belong respectively to USA and England England and France England and USA USA and France None of these
29 In magnet-coil experiment, emf can be produced by Keeping the coil stationary and moving the magnet Keeping the magnet stationary and moving Relative motion of the loop and magnet Any one of above All above
30 The induced current in the loop can be Increased by Using a stronger magnetic field Moving the loop faster Replacing the loop by a coil of many turns All above Both A and B
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