ECAT Physics Online Test With Answers

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ECAT Physics Online Test

Sr. # Questions Answers Choice
1 Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V: 45 V 15 V 90 V 300 V
2 Which of the following quantities remain constant in step up transformer? Current Voltage Power Heat
3 In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is: 0.2 henry 0.1 henry 0.8 henry 0.04 henry
4 The induced emf in a coil is proportional to: Magnetic flux through a coil Rate of change of magnetic flux through the coil Area of the coil Product of magnetic flux and area of the coil
5 What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10-2Wb, and change in current is 0.01 A? 2 H 3 H 1/2 H Zero
6 The device in which induced emf is statically induced emf is: Transformer AC generator Alternator Dynamo
7 For inducting emf in a coil the basic requirement is that: Flux should link the coil Change in flux should link the coil Coil should form a closed loop Both B and C are true
8 The time rate of change of displacement is called: Time Acceleration Speed Velocity
9 One newton is a force that produces an acceleration of 0.5 m/sec2in a body of mass: 2 kg 3 kg 4 kg 8 kg
10 Force is a: Scalar quantity Base quantity Derived quantity None of these
11 An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is: 100 m/sec 140 m/sec 1960 m/sec 196 m/sec
12 Bodies which falls freely under gravity provides good example of motion under: Uniform acceleration Non-uniform acceleration Uniform velocity None of these
13
Swimming becomes possible because of______law of motion:		 First Second Third None of these
14 A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion: First Second Third None of these
15 A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of: 0.5 m/sec2 5 m/sec2 1.5 m/sec2 9.8 m/sec2
16 Slope of velocity-time graph represents: Acceleration Speed Torque Work
17 In the above figures, tell which set is graphs shows that a body is moving uniform velocity: (i) and (ii) (ii) and (iii) (i) and (iii) (ii) and (iv)
18 If the velocity time graph is a straight line parallel to time-axis, then it means that: The body is moving with uniform velocity The body is moving with uniform acceleration The body is at rest None of above
19 The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is: 3 N 4 N 5 N 6 N
20 A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be: 10 m/sec2 20 m/sec2 30 m/sec2 Zero
21 A body of mass 5 kg is acted upon by a total change n momentum will be: 10 NS 100 NS 140 NS 200 NS
22 When brakes are applied to a fast moving car, the passengers will be thrown: Forward Backward Downward None of these
23 Which one of the following is dimensionless. Acceleration Velocity Density Angle
24 The dimension of linear inertia is: MLT<sup>2</sup> ML<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span><span style="font-size: 10.5pt; line-height: 107%; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">T<sup>-2</sup></span> ML<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°T</span><span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> MLT<sup>-1</sup>
25 A ball is dropped from a height of 4.2 meters. To what height will take it rise if there is no loss of KE after rebounding? 4.2 m 8.4 m 12.6 m none of these
26 A body moving with an acceleration of 5 m/sec2started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds? 150 m 250 m 350 m 400 m
27 The shortest distance between two points directed from its initial point to final point is called: Velocity Displacement Speed Distance
28 Ethanol (alcohol) as a type of: Electric fuel Bio fuel Nuclear fuel None of these
29 Root out of the conventional source of energy: Energy from biomass Hydroelectric energy Geothermal energy None of these
30 Biomass includes: Crop residue Natural vegetation Animal dung All of these
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