Why the electrons in beam from an electron gun do not fall as much as a water molecule in stream from a hose due to gravity? from Physics Motion in A Plane Class 11 Manipur Board
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Motion in A Plane

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Physics Part I

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Physics

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Why the electrons in beam from an electron gun do not fall as much as a water molecule in stream from a hose due to gravity?

Vertical distance by which projectile falls while travelling a given distance in horizontal direction is, 

                      space space straight y equals 1 half straight g straight x squared over straight u squared 

From the above relation, straight y proportional to space 1 divided by straight u squared. 

Velocity of electron from electron gun is greater than the water molecule from hose. Therefore, for a given horizontal displacement x, the vertical distance by which the electron beam falls is less than that for water molecule. 
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Give three examples of scalar quantities.

Mass, temperature and energy
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What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
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What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors. 


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What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
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Give three examples of vector quantities.

Force, impulse and momentum.
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