ECAT Pre General Science Physics Chapter 5 Circular Motion Online Test With Answers

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ECAT Pre General Science Physics Chapter 5 Circular Motion Online Test

Sr. # Questions Answers Choice
1 The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are 3 24 126 200
2 The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec-2comes out to be 980 N 580 N 1380 N Zero
3 If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will Increase Decrease Remain constant None of these
4 The number of countries who manage the largest satellite system is: 3 24 126 200
5 Satellites are held in orbits around Earth by its: Gravitational field Magnetic field Own orbital motion Own spin motion
6 Which one is related to angular motion: Moment of a force Moment of inertia Moment of momentum None of these
7 Angular momentum is a: vector quantity Imaginary quantity Complex Quantity Scalar Quantity
8 Direction of angular momentum is determined by: Right hand rule Head to tail rule Left hand rule None of them
9 A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly: 10 m 12 m 13 m 15 m
10 Which of the following pairs does not have identical dimensions? Torque and energy Energy and work Momentum and impulse Mass and moment of inertia
11 Moment of inertia depends upon: Mass Selection of axis of rotation Both of them None of these
12 The center of mass of a sphere lies at: The axis of the sphere Circumference of sphere Center of the sphere None of them
13 When a body moves with a constant speed in a circle: No work is done on it No acceleration is produced in the body Velocity remains constant None of these
14 ______ plays the same role during angular motion as played by the mass in linear motion Torque Angular Momentum Moment of a force Moment of inertia
15 Centripetal acceleration is also called ______ acceleration Tangential Radial Angular None of them
16 One radian is: Greater than one degree Less than one degree Equal to degree none of these
17 When angular acceleration is positive, the body rotates: Slower Slowest Faster None of these
18 Direction of motion _________ in circular motion Changes off and on Changes continously Does not change None of them
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