1.
What is the common symbol for Angular momentum?
Correct Answer
A. L
Explanation
The common symbol for angular momentum is "L".
2.
What is the dimension of Angular momentum?
Correct Answer
A. ML²/T
Explanation
Angular momentum is a physical quantity that describes the rotational motion of an object. It is defined as the product of the moment of inertia (mass times the square of the distance from the axis of rotation) and the angular velocity (rate of change of angle with respect to time). Therefore, the dimension of angular momentum is given by ML²/T, where M represents mass, L represents length, and T represents time.
3.
What is the relationship between orbital angular momentum and orbital angular velocity?
Correct Answer
A. Directly Proportional
Explanation
The relationship between orbital angular momentum and orbital angular velocity is directly proportional. This means that as the orbital angular velocity increases, the orbital angular momentum also increases, and vice versa. The two quantities are directly related and change in the same direction.
4.
Which of these denotes orbital angular velocity?
Correct Answer
C. ω
Explanation
The symbol ω is commonly used to represent orbital angular velocity. It is a measure of the rate at which an object rotates or revolves around a central point or axis. This symbol is frequently used in physics and engineering to represent angular velocity in various contexts, including orbital motion. Therefore, ω is the correct symbol that denotes orbital angular velocity.
5.
How many types of angular momentum are there?
Correct Answer
B. 2
Explanation
There are two types of angular momentum. One is orbital angular momentum, which is the angular momentum associated with the motion of an object around an axis. The other is spin angular momentum, which is the angular momentum associated with the intrinsic spin of a particle.
6.
Which of these is defined as the angular momentum about its centre of mass coordinate?
Correct Answer
A. Spin angular momentum
Explanation
The spin angular momentum is defined as the angular momentum about its center of mass coordinate. It is a property of elementary particles, such as electrons, and is associated with their intrinsic angular momentum. This type of angular momentum is independent of any external motion or orbital motion of the particle. It is a fundamental concept in quantum mechanics and plays a crucial role in understanding the behavior of subatomic particles.
7.
Which of these is defined as the angular momentum of the centre of mass about the origin?
Correct Answer
B. Orbital angular momentum
Explanation
The orbital angular momentum is defined as the angular momentum of the center of mass about the origin. It describes the rotational motion of an object or system around a fixed point or axis. This type of angular momentum is associated with the movement of an object in a circular or elliptical path. It is different from spin angular momentum, which is associated with the intrinsic angular momentum of particles, and radial angular momentum, which does not have a clear definition in classical mechanics. Jouste angular momentum is not a recognized term in physics.
8.
What is the total angular momentum of an object?
Correct Answer
D. Sum of Spin and orbital momenta
Explanation
The total angular momentum of an object is the sum of its spin and orbital momenta. Spin refers to the intrinsic angular momentum of the object, while orbital momentum is associated with the object's motion around a central point. Therefore, the correct answer is the sum of spin and orbital momenta.
9.
Which of these denotes spin angular velocity?Ω^
Correct Answer
C. Ω
Explanation
The symbol Ω represents spin angular velocity.
10.
Which of these is defined as the rate of change of angular momentum, analogous to force?
Correct Answer
C. Torque
Explanation
Torque is defined as the rate of change of angular momentum, analogous to force. Torque is a measure of how much a force acting on an object causes it to rotate. It is the product of the force applied and the distance from the axis of rotation. When a torque is applied to an object, it causes a change in its angular momentum, just like how a force causes a change in linear momentum. Therefore, torque is the correct answer in this context.