Start learning →

NEET UG Mechanical Properties of Solids and Fluids — practice questions — page 2

Explore 97 free Mechanical Properties of Solids and Fluids questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Mechanical Properties of Solids and Fluids with Quill →

Mechanical Properties of Solids and Fluids questions and exercises with answers

Showing questions 31–60 of 97.

Surface tension T of a liquid is best defined as:Read the answer and worked solution →The excess pressure inside a spherical liquid drop of radius R and surface tension T is:Read the answer and worked solution →The height to which a liquid rises in a capillary tube of radius r is (with surface tension T, contact angle θ, density ρ):Read the answer and worked solution →A liquid emerges from a hole at depth h below the free surface of a large open tank. The exit speed (Torricelli's law) is:Read the answer and worked solution →Two soap bubbles of radii R₁ < R₂ are connected by a tube. Air flows:Read the answer and worked solution →A solid object floats with 80 % of its volume submerged in water (ρ_water = 1000 kg m⁻³). The density of the object is:Read the answer and worked solution →Poiseuille's law gives the volume flow rate Q of a viscous fluid through a horizontal pipe of length L and radius r under pressure difference ΔP as:Read the answer and worked solution →The force a liquid exerts on a submerged surface is always:Read the answer and worked solution →Pressure is defined as the normal force acting per unit:Read the answer and worked solution →Pressure is which kind of physical quantity?Read the answer and worked solution →The SI unit of pressure is named after the scientist:Read the answer and worked solution →Blaise Pascal was a scientist from:Read the answer and worked solution →The first method of measuring atmospheric pressure came from:Read the answer and worked solution →Torricelli's pressure measuring device is known as the mercury:Read the answer and worked solution →In the barometer, the tube of mercury is set up:Read the answer and worked solution →At sea level the barometric mercury column stands at about:Read the answer and worked solution →A pressure equal to one millimetre of mercury is called a:Read the answer and worked solution →Pressure applied to an enclosed fluid is transmitted:Read the answer and worked solution →Pascal's law says the transmitted pressure acts in directions that are:Read the answer and worked solution →Which device is based on Pascal's law?Read the answer and worked solution →Brakes in automobiles that work on Pascal's law are called:Read the answer and worked solution →The rule about the upthrust on an immersed body is credited to:Read the answer and worked solution →Archimedes was a philosopher and engineer from:Read the answer and worked solution →Pressure above atmospheric at a given depth is called:Read the answer and worked solution →The path taken by a fluid particle in steady flow is a:Read the answer and worked solution →Steady flow is achieved when the flow speed is:Read the answer and worked solution →Bernoulli's principle is derived using the conservation of:Read the answer and worked solution →Daniel Bernoulli was a physicist from:Read the answer and worked solution →The word efflux, as used for fluids, means:Read the answer and worked solution →True or false on fluidsRead the answer and worked solution →

Worked practice questions

Surface tension T of a liquid is best defined as:

  1. Force per unit length on the surface
  2. Force per unit area in the bulk
  3. Energy per unit volume of liquid
  4. Pressure inside a spherical drop
Show answer and solution

Correct answer: A. Force per unit length on the surface

1. Surface tension T is force per unit length: the force any portion of the surface exerts on an adjacent portion across a line on the surface. 2. SI unit: N m⁻¹. Numerically equal to surface energy per unit area (J m⁻²). 3. Pressure has different dimensions, so (B) and (D) are wrong. _Source: syllabus Physics Ch 9 §9.8 Surface Tension_

Open this question →

The excess pressure inside a spherical liquid drop of radius R and surface tension T is:

  1. T / R
  2. T / (2 R)
  3. 4 T / R
  4. 2 T / R
Show answer and solution

Correct answer: D. 2 T / R

1. For a drop (single surface), Laplace's relation gives ΔP = 2 T / R. 2. For a soap bubble (TWO surfaces — inner + outer), ΔP = 4 T / R. 3. The smaller the drop, the larger the excess pressure — why fine droplets evaporate first. _Source: syllabus Physics Ch 9 §9.8 Drops, Bubbles, Capillary Action_

Open this question →

The height to which a liquid rises in a capillary tube of radius r is (with surface tension T, contact angle θ, density ρ):

  1. h = 2 T cosθ / (r ρ g)
  2. h = T cosθ / (r ρ g)
  3. h = T sinθ / (r ρ g)
  4. h = ρ g r / (2 T cosθ)
Show answer and solution

Correct answer: A. h = 2 T cosθ / (r ρ g)

1. Balance upward surface-tension force around the meniscus circumference with weight of the lifted liquid. 2. Upward force = T cosθ · 2π r. 3. Weight of lifted column = ρ g h · π r². 4. Equate: h = 2 T cosθ / (r ρ g). 5. So h is inversely proportional to r — narrower tubes lift higher (mercury depresses, since cosθ < 0). _Source: syllabus Physics Ch 9 §9.8 Capillary Rise_

Open this question →

How to practise

  1. Choose a Mechanical Properties of Solids and Fluids question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Mechanical Properties of Solids and Fluids practice for NEET UG. Read explanations as you go. No signup form needed to start.

Practise Mechanical Properties of Solids and Fluids →

More Physics topics

Electric Charges and FieldsMoving Charges and MagnetismRay Optics and Optical InstrumentsSemiconductor ElectronicsCurrent ElectricityDual Nature of Radiation and MatterKinetic Theory & OscillationsSystem of Particles and Rotational Motion