NCERT Solutions For Class 10 Science Free PDF Download (Updated For )
NCERT Solutions for Class 12 Maths, Biology, Chemistry, Mathematics, Physics, Physical Education, Accountancy, Economics, History and Geography etc are given by ncerthelp here have been illuminated by our best Mathematics educators, who have numerous long stretches of involvement with the field of CBSE Board training.� The CBSE NCERT Solutions for Class 11 Maths, Maths in Hindi, Physics, Physics in Hindi, Chemistry, Chemistry in Hindi, Biology, Biology in Hindi, English, English Flamingo, English Vistas, Hindi, Hindi Antra, Hindi Antral, Hindi Aroh, Hindi Vitan, Business Studies, Economics, Macro Economics, Micro Economics and Accountancy etc. Ncert Solutions for Class 12 Maths. Ncert Solutions for Class 12 Chemsitry. Get Best NCERT Solutions for Class 6, 7, 8, 9, 10, 11, 12 in both English and Hindi Medium. All NCERT Questions and answers are now solved and updated according to new academic session These All NCERT Solutions are well defined by the respective subject teachers so that all Student can easily understand.� If you are looking for the NCERT Solutions for Class 12 all subjects. Here you can get free NCERT solutions from the following subject wise. This table includes the NCERT Solutions and UP Board Solutions for Class 12 � Maths, Physics, Chemistry, English, Economics, Biology, and Business Studies etc. NCERT Class 12 Solutions are more important as the syllabus of Class 12 is somehow same as competitive exams. Class X Science NCERT Solutions For Electricity. Q1. What does an electric circuit mean? Ans. A continuous conducting path consisting of wires and other resistances and a switch between the two terminals of a cell or a battery along which an electric current flow is called a circuit. Q2. Define the unit of current.� Amount of current will be halved. Q Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal? Ans. The coils of such heating appliances are made up of an alloy rather than a pure metal because: (a) The resistivity of an alloy is much higher than that of a pure metal. (b) An alloy does not undergo oxidation easily even at high temperature when it is even red hot. Q (a) Which among iron and mercury is a better conductor?.

Question Explain why a The blood pressure in humans is greater at the feet than at the brain. Answer: a The height of the blood column is more for the feet as compared to that for the brain.

Consequently, the blood pressure in humans is greater at the feet than at the brain. So, pressure also does not reduce linearly with height.

That is why there is no fixed direction for the pressure due to liquid. Hence hydrostatic pressure is a scalar quantity. Explain why a The angle of contact of mercury with glass is obtuse, while that of water with glass is acute. Put differently, water wets glass while mercury does not. Answer: a Let a drop of a liquid L be poured on a solid surface S placed in air A. Therefore, cos 0 is negative. Therefore cos 0 is positive. In case of mercury force of cohesion due to mercury molecules is quite strong as compared to adhesion force due to glass.

Consequently, mercury does not wet glass and tends to form drops. Since h as force is independent of the area of liquid surface therefore, surface tension is also independent of the area of the liquid surface.

Due to this, the detergent will penetrate more in the narrow pores of the clothes. In the absence of any external force for a given volume of liquid its surface area and consequently.

Surface energy is least for a spherical shape. It is due to this reason that a liquid drop, in the absence of an external force is spherical in shape. Fill in the blanks using the words from the list appended with each statement: a Surface tension of liquids generally�����.

Explain why a To keep a piece of paper horizontal, you should blow over, not under, it. Answer: a When we blow over the piece of paper, the velocity of air increases. Thus, the paper remains horizontal. Therefore, the velocity has more effect compared to the pressure. It is for this reason that needle of the syringe controls flow rate better than the thumb pressure exerted by the doctor.

While the flowing fluid carries forward momentum, the vessel gets a backward momentum. But because of air the Magnus effect takes place. Due to the Magnus effect the spinning cricket ball deviates from its parabolic trajectory. A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1. What is the pressure exerted by the heel on the horizontal floor? Pascal duplicated it using French wine of density kg m Determine the height of the wine column for normal atmospheric pressure.

A vertical off-shore structure is built to withstand a maximum stress of 10 9 Pa. Is the structure suitable for putting up on top of an oil well in the ocean? Take the depth of the ocean to be roughly 3 km, and ignore ocean currents. The structure will be suitable for putting upon top of an oil well provided the pressure exerted by sea water is less than the maximum stress it can bear.

A hydraulic automobile lift is designed to lift cars with a maximum mass of kg. The area of cross-section of the piston carrying the load is cm 2. What maximum pressure would the smaller piston have to bear? Answer: This is also the maximum pressure that the smaller piston would have to bear.

A U tube contains water and methylated spirit separated by mercury. The mercury columns in the two arms are in level with What is the relative density of spirit? As the mercury columns in the two arms of U tube are in level, therefore pressure exerted by each is equal. Since the flow of water in a river is rapid, way cannot be treated as streamlined motion, the theorem cannot be used.

Glycerine flows steadily through a horizontal tube of length 1. If the amount of glycerine collected per second at one end is 4. Figures a and b refer to the steady flow of a non-viscous liquid. Which of the two figures in incorrect? Answer: Figure a is incorrect. As a result, the water should not rise higher in the tube where there is a kink i. The cylindrical tube of a spare pump has a cross-section of 8. If the liquid flow inside the tube is 1. A U-shaped wire is dipped in a soap solution, and removed.

A thin soap film formed between the wire and a light slider supports a weight of 1. The length of the slider is 30 cm. What is the surface tension of the film? Answer: In present case force of surface tension is balancing the weight of 1. What is the weight supported by a film of the same liquid at the same temperature in Fig. In Fig. What is the pressure inside a drop of mercury of radius 3.

The atmospheric pressure is 1. Also give the excess pressure inside the drop. Answer: Since data is correct up to three significant figures, we should write total pressure inside the drop as 1. What is the excess pressure inside a bubble of soap solution of radius 5. If an air bubble of the same dimension were formed at depth of A tank with a square base of area 1. The bottom of the partition has a small-hinged door of area 20 cm 2.

The tank is filled with water in one compartment, and an acid of relative density 1. Compute the force necessary to keep the door close. A manometer reads the pressure of a gas in an enclosure as shown in Fig.

The liquid used in the manometers is mercury and the atmospheric pressure is 76 cm of mercury. Ignore the small change in the volume of the gas. Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill up to a particular common height.

Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?

Answer: Pressure and therefore force on the two equal base areas are identical. But force is exerted by water on the sides of the vessels also, which has a non-zero vertical component when sides of the vessel are not perfectly normal to the base.

This net vertical component of force by water on the sides of the vessel is greater for the first vessel than the second. Hence, the vessels weigh different even when the force on the base is the same in the two cases. During blood transfusion, the needle is inserted in a vein where the gauge pressure is Pa. At what height must the blood container be placed so that blood may just enter the vein?

Discuss qualitatively. Answer: a If dissipative forces are present, then some forces in liquid flow due to pressure difference is spent against dissipative forces, due to which the pressure drop becomes large. Take viscosity of blood to be 2. Density of blood is 1. A plane is in level flight at constant speed and each of its wings has an area of 25 m 2. Take the viscosity of air at the temperature of the experiment to be 1.

How much is the viscous force on the drop at that speed? Neglect buoyancy of the drop due to air. Neglecting upward thrust due to air, we find that terminal speed is. A narrow tube of radius 1. By what amount does the mercury dip down in the tube relative to the liquid surface outside? Surface tension of mercury at the temperature of the experiment is 0. Two narrow bores of diameters 3. If the U-tube contains water, what is the difference in its levels in the two limbs of the tube?

Surface tension of water at the temperature of the experiment is 7.

Today:

A Lorem lpsum 260 boatplans/aluminum-boats/model-ship-building-wood-model ship building wood model finish should be left open so a hunter as well as his dog can get in as well as out of 10th ncert physics solutions ag blind. Any warn one more investigate upon a theme. We presumably can establish upon the little small trailer which even the tiny automobile can draw differently we get the family sized tour trailer still light sufficient which your crossover or even the tiny select up can lift with palliate .

Practical Boat Builder Magazine Free Fishing Boats For Sale Ventura Ca Co Fishing Sailboat For Sale 42