Answer
Verified109.2k+ views
Hint: The hydrometer is a device that is used to measure the density and relative density of a liquid in general. It consists of a cylindrical stem and a bulb weighted with mercury. It goes deeper into a more denser liquid and floats higher in a less dense one, thus helping to measure the density of the liquid through a calibrated scale.
Complete step by step answer:
The hydrometer is a device used to measure the characteristics of a liquid, specifically, its density and relative density or specific gravity. It consists of a bulb weighted with mercury attached to a cylindrical glass tube. The glass tube sometimes has a rubber ball at the other end to suck in the liquid whose characteristics have to be measured.
The hydrometer is dipped into the liquid to be examined. When the bulb of the hydrometer is inside the liquid, the depth up to which the bulb goes into the liquid (called the depth of floatation) is observed and then the reading is taken. The glass tube has readings on it that are calibrated accordingly to read the density and relative density of the liquid.
Hence, the correct option is A) A cylindrical stem and a bulb weighted with mercury.
Note: The hydrometer actually makes use of the Archimedes’ principle which states that when a body is partially or completely immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the body.
Thus, for a liquid that has a lower density, the hydrometer will sink deeper, and accordingly, a higher reading will come on the line of intersection of the surface of the liquid and the glass tube.
The Archimedes’ principle is one of the most fundamental principles in fluid statics and students are encouraged to understand it fully and to research various other instruments or daily life examples implementing it. One of these can be the sinking and rising of a submarine.
Complete step by step answer:
The hydrometer is a device used to measure the characteristics of a liquid, specifically, its density and relative density or specific gravity. It consists of a bulb weighted with mercury attached to a cylindrical glass tube. The glass tube sometimes has a rubber ball at the other end to suck in the liquid whose characteristics have to be measured.
The hydrometer is dipped into the liquid to be examined. When the bulb of the hydrometer is inside the liquid, the depth up to which the bulb goes into the liquid (called the depth of floatation) is observed and then the reading is taken. The glass tube has readings on it that are calibrated accordingly to read the density and relative density of the liquid.
Hence, the correct option is A) A cylindrical stem and a bulb weighted with mercury.
Note: The hydrometer actually makes use of the Archimedes’ principle which states that when a body is partially or completely immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the body.
Thus, for a liquid that has a lower density, the hydrometer will sink deeper, and accordingly, a higher reading will come on the line of intersection of the surface of the liquid and the glass tube.
The Archimedes’ principle is one of the most fundamental principles in fluid statics and students are encouraged to understand it fully and to research various other instruments or daily life examples implementing it. One of these can be the sinking and rising of a submarine.
Recently Updated Pages
If x2 hx 21 0x2 3hx + 35 0h 0 has a common root then class 10 maths JEE_Main
The radius of a sector is 12 cm and the angle is 120circ class 10 maths JEE_Main
For what value of x function fleft x right x4 4x3 + class 10 maths JEE_Main
What is the area under the curve yx+x1 betweenx0 and class 10 maths JEE_Main
The volume of a sphere is dfrac43pi r3 cubic units class 10 maths JEE_Main
Which of the following is a good conductor of electricity class 10 chemistry JEE_Main