Jupeb 2018 Physics Essay and Obj Expo

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PHYSICS OBJ

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11-20CDADDBCBAB

21-30AAB-CDACAC

31-40BACACADBDC

41-50DCAAACCAAD

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(2a)

*In Tabular form*

(i)The velocity of streamline flow is less than critical velocity
While
In turbulent motion the liquid moves with a velocity greater than the critical velocity of the liquid.

(ii)Streamline flow is laminar whereas, turbulent flow is
non-laminar.

(iii)
It is an orderly type of motion in which the liquid flows in parallel layers

while, turbulent motion is disorderly type of motion.

(2aii)
Viscosity is the internal friction between layers of a liquid and gas in motion

Factors affecting viscosity

i)Temperature
ii)pressure

(2b)..........

(2c)
Conservative force are those forces which allows the opportunity of two way conversion among potential and kinetic energies are said to be conservative forces.

Example:
i)Gravitational force
ii)Magnetic force
ii)Electrostatic force

While
Non - conservatve force is the force is called non conservative if work is done by the force is dependent on path followed by body .or The forces which are not conservative are called non conservative
forces.

Example:
i)Frictional forces
ii)Viscous forces
iii)Induction forces

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5c)The induced electromotive force across a conductor is equal to the rate at which magnetic flux is cut by the conductor.
Factors are
Magnetic field strength (the magnetic flux density).

Speed of 'cutting'.

Number of pieces of wire.