Physics ECAT Pre Engineering MCQ's Test For Full Book With Answers

Physics ECAT Pre Engineering MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 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
2 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
3 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
4 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
5 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
6 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
7 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
8 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
9 Michael Faraday and Joseph Henry belong respectively to USA and England England and France England and USA USA and France None of these
10 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
11 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
12 The body oscillates due to ______ accelerates and overshoots the rest position due to _______ Applied force, Inertia Restoring force, Friction Frictional force, Inertia Restoring force, Inertia
13 Amplitude in SHM is equivalent to ______ in circular motion Diameter Radius Circumference None of these
14 The graph showing the variation of displacement with time is a Sine curve Straight line Parabola None of these
15 When a body is vibrating, the displacement from mean position Increases with time Decreases with time Changes with time None of these
16 The restoring force is ______ and opposite tot he applied force within ______ Equal, Elastic limit Different, The walls of the laboratory Different, Elastic limit None of these
17 The SI unit of spring constant is identical with that of Force Surface tension Pressure Loudness
18 Which one of the following is an example of SHM Motion in a plane Motion in a swing Motion in a car None of these
19 The unit of spring constant is J-sec Metre Nm<sup>-1</sup> None of these
20 When a body moves along a circular path with constant speed, it has an acceleration, which is always directed Along the tangent Towards the centre Away from the centre None of them
21 One radian is Greater than one degree Less than one degree Equal to one degree None of these
22 Centripetal acceleration is also called ________ acceleration Tangential Radial Angular None of these
23 Direction of motion _______ in circular motion Changes off and on Changes continuously Does not change None of them
24 An axis of rotation Is a straight line Is normal to the plane of rotation Passes through pivot point O All of them
25 Conventionally the angular velocity is directed at an angle of 90° to the axis of rotation 30° to the axis of rotation 0° to the axis of rotation None of the above
26 A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is 0.05 m 0.08 cm 0.8 m 0.008 m
27 Tick the conservative force Tension in a string Air resistance Elastic spring Frictional force
28 A field in which the work done in moving a body along closed path is zero is called Nuclear Field Conservative field Gravitational field Non-conservative field
29 When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is 0.5 J 2 J 0.25 J 1 J
30 The work done in moving a body between two points in a conservative field is independent of the Direction Force applied Path followed by the body Power
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