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L-2 Introduction to Scalars and Vectors II Video Lecture | Additional Study Material for JEE
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FAQs on L-2 Introduction to Scalars and Vectors II Video Lecture - Additional Study Material for JEE
| 1. What is the difference between a scalar and a vector? |  |
Ans. A scalar is a physical quantity that only has magnitude, while a vector is a physical quantity that has both magnitude and direction. Scalars can be represented by a single real number, while vectors require both magnitude and direction to be fully described.
| 2. How can we represent vectors? | |
Ans. Vectors can be represented using various methods such as geometrically, analytically, or algebraically. Geometrically, vectors can be represented by arrows with their length representing the magnitude and their direction representing the direction. Analytically, vectors can be represented using components along different coordinate axes. Algebraically, vectors can be represented using unit vectors and their respective magnitudes.
| 3. What are some examples of scalar quantities? | |
Ans. Some examples of scalar quantities include temperature, mass, time, volume, speed, energy, and density. These quantities only have magnitude and do not have a specific direction associated with them.
| 4. Give some examples of vector quantities. | |
Ans. Some examples of vector quantities include displacement, velocity, acceleration, force, momentum, and electric field. These quantities have both magnitude and direction and can be represented by arrows in a specific direction.
| 5. How can we add or subtract vectors? | |
Ans. Vectors can be added or subtracted using the parallelogram law or the triangle law. In the parallelogram law, the two vectors to be added are drawn as adjacent sides of a parallelogram, and the resultant vector is the diagonal of the parallelogram starting from the common point of the two vectors. In the triangle law, the two vectors to be added are drawn as adjacent sides of a triangle, and the resultant vector is the third side of the triangle. To subtract vectors, the negative of the vector to be subtracted is added to the vector from which it is being subtracted.
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Dec 22, 2024 Last updated |
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