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 When quarter of a circle is completed, the phase of vibration is: 90<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> 180<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> 45<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> 360<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>
2 Angular velocity is a: Scalar quantity Vector quantity Complex quantity None of these
3 In rotational motion, analogue of force F us called: Couple Torque Mass Moment of intertia
4 The useful unit of angular replacement in SI unit is: Degree Revolution Radian Metre
5 Radian is defined as the angle subtended at the center of a circle by an arc of: Length equal to its diameter Length equal to its radius Any length None of these
6 A body moving along the circumference of a circle of radius R completes one revolution. The radius of the covered path to the angle subtended at the center is: Radius of the circle Twice the radius Thrice the radius None of these
7 A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be: 49 rad/sec<sup>2</sup> 1 rad/sec<sup>2</sup> 0.16 rev/sec<sup>2</sup> Both A and C Both B and C
8 A car is turning around a corner at 10 m/sec as it travels along an arc of circle. If value of centripetal acceleration is 10 m/sec2in this case, find radius of the circular path: 1 m 5 m 10 m 15 m
9 A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be: 8.1 X 10<sup>7</sup>N 625 N 6250 N None of these
10 A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes: 9.42 rad/sec 2.6 rev/sec 1.5 rev/sec Both A and C
11 The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is: 5 rad/sec<sup>2</sup> -10 rav/sec<sup>2</sup> -10 rad/sec<sup>2</sup> -5 rav/sec<sup>2</sup>
12 A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is: 38 m/sec 3.8 m/sec 0.6 m/sec None of these
13 A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.
if centripetal acceleration is 9.8 m/sec2, then its angular velocity in rad/sec is:
 22/7 7 14 21
14 One radian is equal to: 30.3<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> 45.3<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> 50.3<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> 57.3<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>
15 When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed: Along the tangent Toward the centre Away from the centre None of them
16 One radian is: Greater than one degree Less than one degree Equal to one degree None of them
17 Centripetal acceleration is also called _______ acceleration: Tangential Radial Angular None of them
18 Direction of motion_______ in circular of motion: Changes off and on Changes continuously Does not change None of them
19 Conventionally the angular velocity is directed to an angle of: 90<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;">° to the axis of rotation</span> 30<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;">° to the axis of rotation</span> 0<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;">° to the axis of rotation</span> None of the above
20 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 m 0.8 m 0.008 m
21 Einstein's theory about gravity if better than Newton's because it gave explanation of: Inverse square law Bending of light Both A and B None of above
22 INTELSAT operates at frequencies 4, 6, 11, 14 having unit of: KHz MHz GHz BHz
23 The number of "Earth stations" which transmit signals to satellites and receive signals from them are: 3 24 126 200
24 The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec-2comes out to: 980 N 580 N 1380 N Zero
25 If a gymnast is sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will: Increase Decrease Remains constant None of these
26 Conventional the angular Velocity is Directed at an angle of: <font face="arial, sans, sans-serif"><span style="font-size: 13.3333px;">90</span></font><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;">° to the axis of rotation</span> 30<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;">° to the axis of rotation</span> 0<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;">° to the axis of rotation</span> None of above
27 The work done on the body will be zero if: No force is applied on the body Force is applied but no displacement Angle between F(force) and d(displacement) is 90<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> All of these are correct
28 A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is: 1.25 J 12.5 J 125 J None of these
29 If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents: Power Work Pressure None of these
30 When a wall is pushed by a person very strongly, he has done: Maximum work Zero work Positive work Negative work
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