Rainbow Mind map and MCQ of Pressure

 

🌈  Rainbow  Mind map Pressure

Definition: Thrust per unit area

Formula:  P = F /A

Factors affect: The magnitude of thrust acting on the surface  and  surface area on which thrust acts.

Units: S.I unit N / m²

           CGS dyne/ cm²

 1 N/ m² = 10 dyne / cm²

Pascal law: The pressure exerted by a Liquid at a depth is same  in all directions.

Factors affecting liquid pressure: Height of a liquid column and density of a liquid

Atm: Atmospheric pressure is the thrust on a unit area of the earth surface due to air column above it.

1atm= 0.76 m of mercury column

           = 1.03 x 10⁵ Pa

Check your understanding

Here's a video representation for the same:

Rainbow 🌈 MCQ of Pressure 

 

1.Pressure is 

 A) Product of force and Area
 B) Product of force and displacement 
 C) Thrust per unit area 
 D) None of these

ANSWER= (C) Thrust per unit area 
Explain:- Pressure is defined as Thrust per unit area.

 

2. Formula for Pressure is 

 A) P = F x A
 B) P = F x D
 C) P= F / A
 D) none of above

ANSWER= (C) P = F/A
Explain:- Pressure  = Thrust/ Area

 

3. Factors affecting Pressure 

 A) Thrust acting on the surface 
 B) Surface area on which thrust acts 
 C) Both of them
 D) none of above 

ANSWER= (C) Both of them
Explain:- Two factors affecting Pressure- Thrust on surface and surface area on which thrust acts. 

 

4. 1 N/ m²  = _______ dyne/ cm²

 A) 1
 B) 10
 C) 100
 D) 1000

ANSWER= (B) 10
Explain:-1 N/ m² = 10 dyne/ cm²

 

5. The pressure exerted by a Liquid at a depth is same at all directions -

 A) Pressure law
 B) Hydrostatic Paradox 
 C) Pascal's Law
 D) Liquid pressure 

ANSWER= (C) Pascal's Law
Explain:-  Pascal's Law states that the pressure exerted by a Liquid at a depth is same in all directions. 

 

6.Factors affecting liquid pressure 

 A) Liquid column 
 B) density of a liquid 
 C) both
 D) None of above

ANSWER= (C) both
Explain: Factors affecting Liquid pressure are - Liquid column and density of a liquid.

 

7. 1 atm = ______ Pa

 A) 1.
 B) 1.03 x 10⁵
 C) 1 03
 D) none of above 

ANSWER= (B) 1.03 x 10⁵ 
Explain:- 1 atm = 1.03 x 10⁵ Pa

LINK FOR LIQUID PRESSURE

LINK FOR Atmospheric Pressure.

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