Pascal's Law

Q.

State pascals law? Name its two applications?

Q.

On what factors does the buoyant force (or buoyancy) depend?

Q.

What is centre of buoyancy?

Q. What is buoyant force?

Q.

Hydraulic lift working is based on

1. Bernoulli's principle

2. Archimedes principle

3. Pascal's Law

4. Boyle's law

Q. What are the factors affecting the Buoyant Force?

Q.

What Is the value of $e^0{e}^1$?

Q.

State Pascal's law of transmission of pressure.

Q.

What is pascals law

Q.

When does a body float in a liquid?

Q. All bodies immersed in a given fluid experiences the same buoyant force.

1. True
2. False

Q. The unit of buoyant force is ___.

Q.

Mention two uses of Hydraulic brake.

Q.

A metallic sphere of radius 2.0 cm is completely immersed in water. Find the force of buoyancy on it.

Q.

The device which use Pascal law is

1. Hydraulic jack

2. Hydraulic press

3. Hydraulic Brakes

4. All of these

Q.

A barber raises his customer’s chair by applying a force of 150N to a hydraulic piston of area 0.01 $m^2$. If the chair is attached to a piston of area 0.1 $m^2$, what is the maximum weight of the customer who can be raised by using this chair? Assume the chair itself has a mass of 5 kg.

1. 148 kg

2. 153 kg

3. 150 kg

4. 100 kg

Q.

Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and to the walls of the containing vessel. This law was first formulated by:

1. Archimedes

2. Boyle

3. Pascal

4. Bernoulli

Q.

Is the upthrust, more than, equal to, or less than the weight of the body when the body just floats in a liquid

Q.

Why pressure exerted in any confined mass of fluid is transmitted indiminished in all directions

Q.

The area of cross section of press plunger of hydraulic press is 4$m^2$. It is required to overcome a resistive load of 400N on it.If the area of cross section of pump plunger is 0.01$m^2$ then force required on pump plunger is

1. 0.1N

2. 10N

3. 1N

4. 100N

Q.

What is a pascal in physics?

Q.

A force of 250 N is applied to the smaller piston of hydraulic machine. Neglecting friction, find the force exerted on the large piston, if the area of the pistons is $5m^2$ and $25m^2$ respectively.

1. 1200 N

2. 1300 N

3. 1350 N

4. 1250 N

Q.

Which type of pulley is helpful in changing the direction of effort?

1. Fixed pulley

2. Movable pulley

3. Compound pulley

4. Triple pulley

Q.

A body experiences greater buoyant force when it is fully submerged compared to when it is partially.

1. True
2. False

Q.

Which of the following is based on Pascal's law?

1. Hydraulic press.

2. Hydraulic jack.

3. Hydraulic brakes.

4. Drum brakes.

Q.

NAME THE FOLLOWING:

The force which makes heavy objects appears lighter when immersed in a liquid.

Q.

Describe briefly with the help of a diagram, a hydraulic lift used in service stations.

Q.

In a hydraulic machine, the two pistons are of the area of cross-section in the ratio 1 : 20. What force is needed on the narrow piston to overcome a force of 200 N on the wider piston?

1. 2 : √3

2. 2 : 1

3. 1 : 1

4. √3 : 2

Q.

How is the small cotton thread used to light the oil lamp(diyas) able to soak the oil in a reverse motion or backward when gravity will totally resist anything to move upward . then how is this possible?

Q.

Define buoyancy