Pick out the two scalar quantities in the following list: Force, angular momentum, work, current,

Monjur Alahi

Pick out the two scalar quantities in the following list: Force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, relative velocity.


0 like 0 dislike
1 views
Share with your friends

2 Answers

Salim Ahmed Kawsar

Call

Work and current are scalar quantities.
Work done is given by the dot product of force and displacement. Since the dot product of two quantities is always a scalar, work is a scalar physical quantity. Current is described only by its magnitude. Its direction is not taken into account. Hence, it is a scalar quantity

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Salim Ahmed Kawsar

Call

Work and current are scalar quantities.

Work done is given by the dot product of force and displacement. Since the dot product of two quantities is always a scalar, work is a scalar physical quantity.

Current is described only by its magnitude. Its direction is not taken into account. Hence, it is a scalar quantity.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
When a force retards the motion of a body, what is the nature of work done by the force? State reason. List two examples of such a situation

The work done by the force is negative because this force acts opposite to the direction of movement of the body, thereby hindering the motion.  Example:  1. Work done by the force...

1 Answers 2 views
Classify the following as scalar and vector quantities. (i) time period (ii) distance (iii) force

(i) Time period is a scalar quantity as it involves only magnitude. (ii) Distance is a scalar quantity as it involves only magnitude. (iii) Force is a vector quantity as it involves...

1 Answers 1 views
State, for each of the following physical quantities, if it is a scalar or a vector:

Scalar: Volume, mass, speed, density, number of moles, angular frequency Vector: Acceleration, velocity, displacement, angular velocity   A scalar quantity is specified by its magnitude only. It does not have any direction associated...

1 Answers 1 views
State, for each of the following physical quantities, if it is a scalar or a vector: Volume, mass, speed, acceleration,

Scalar: Volume, mass, speed, density, number of moles, angular frequency Vector: Acceleration, velocity, displacement, angular velocity A scalar quantity is specified by its magnitude only. It does not have any direction associated...

1 Answers 1 views
A comet orbits the Sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum,

No No Yes No No Yes Angular momentum and total energy at all points of the orbit of a comet moving in a highly elliptical orbit around the Sun are constant. Its linear speed, angular speed,...

1 Answers 1 views
Angular momentum of the particle rotating with a central force is constant due to

(d) : Central forces passes through axis of rotation so torque is zero. If no external torque is acting on a particle, the angular momentum of a particle is constant.

1 Answers 1 views
Out of the following pair, which one does NOT have identical dimensions is (1) angular momentum and Planck’s constant

(3) Using dimension

1 Answers 1 views
Match List-I with List-II and select the correct answer using the codes given below the lists: List-I (Year) List-II (Event)

(c) First Anglo-Burmese War – Burmese defeated, Treaty of Yandobo (1826); First Anglo-Afghan War – Afghan defeated (1838); First Anglo-Maratha War – Britishers were defeated, Treaty of Salbai (1782); Second...

1 Answers 1 views
What is true about scalar quantities ? (A) Scalars quantities have direction also. (B) Scalars can be added arithmetically.

(B) Scalars can be added arithmetically.

1 Answers 1 views
Time is an example of : (A) Scalar (B) Vector (C) Scalar or vector (D) Neither scalar nor vector

Time is an example of Scalar

1 Answers 2 views
X