Physics question and answers for April 05, 2024
- Q 6 The surface tension and vapour pressure of a fluid at 20 C is 8 x 10 2 N m and 4 10 Pa respectively What is the radius of...
- Q 5 The length of wire increases by 9 mm when weight of 2 5 kg is hung from the free end of wire If all conditions are kept the same...
- Q 1 For a certain gas the ratio of specific heats is giver to be y 1 5 For this gas 1 C 3R J 2 Cp 3R J 5R
- Q A rod of length 1 cross sectional area A and Young s modulus Y is subjected to two forces F and 10a b F 12AY 2 2F at its two...
- Q A semicircular glass tube filled with water containing an air bubble is sealed at its ends The tube is held with its plane vertical and made to move in its...
- Q A cube made of material having a density of 0 9 x 103 kg m floats between water and a liquid of density 0 7 x 10 kg m which...
- Q Figure shows elongation versus temperature for two different materials If these metals be employed to form a bimetallic strip of thick ness 6cm and heated it bends into an arc...
- Q A rod of length f coefficient of thermal expansion a is heated by a temperature difference AT It was constrained between two walls at a distance As a result it...
- Q 15 If 3 x 10 J of work is done in stretching a wire through 1 mm the work done in stretching it through 3 mm is 1 9 x...
- Q 3 OA In the given figure if the dimensions of the two wires are same but materials are different then Young s modulus is suitable shock absorber 109 Load B...
- Q A In the arrangement shown a rod of length AA has a rigid block fixed at its end A End A of the rod is fixed to a wall as...
- Q The velocity of water in a river is 18 km hr near the surface If the river is 5 m deep find the shearing stress between the horizontal layers of...
- Q 3 10 Asteel wire of radius 0 4 x 10 m and length 1 m is tightly clamped between points A and B which are separated by 1 m and...
- Q ess A force F is applied along a rod of transverse sectional area A The normal stress to a section PQ inclined 0 to transverse section is 1 3 F...
- Q figure Now from this position tube is pulled up slightly then length of the mercury column in the tube will ba not perfect vacuum 70 cm 40 3 sh Educational...
- Q 1 Calculate the amount of energy needed to break a drop of petrol of volume lcc into a thousand million drops of equal size S T of petrol 0 025...
- Q A metal sphere with radius 4 36 cm is suspended in a large metal box with interior walls that are maintained at 36 Celsius Th emissivity of the metal sphere...
- Q An open U tube of uniform cross section contains mercury If 27 2 cm of water column is poured into one limb of the tube how high does the mercury...
- Q 3 A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V If T is the surface...
- Q Three blocks each of same mass m are connected with wires w and we of some cross sectional area a and young s modulus y Neglecting friction the strain developed...
- Q 12 Calculate the viscous force acting on a rain drop of diameter 1 mm falling with a uniform velocity 2 m s through air The coefficient of viscosity of air...
- Q 4 Two soap bubbles of radii equal to 6 cm and 8 cm are touching each other over a common surface Radius of the common surface will be 1 3...
- Q 3 1 2 3 Q R A uniform rod of mass M and length L is placed on a smooth horizontal surface If a horizontal force F is applied at...
- Q 23 The following four wires are made of the same material Which of these will have the largest extension when the same tension is applied 1 length 300cm diameter 3mm...
- Q A smooth rubber cord of length with spring const k is suspended from O The other end is fitted with a bob B A small sleeve of mass m starts...
- Q Railway lines are laid with gaps to allow for expansion If the gap between steel rails 66 m long be 3 63 cm at 10 C then at what temperature...
- Q A wire is elongated by an external force which is always equal to restoring force developed in the wire material W work is done by the external force in elongating...
- Q An air bubble of radius 1 mm is located at a depth of 20 cm below water level The excess pressure inside the bubble above the atmospheric pressure is Given...
- Q PHYSICS BY SAAMI SIR XI XI elasticity of the cube is and its coefficient of volume 38 A ball falling in decrease in its expansion is a modulus of the...
- Q A metal wire of length L is suspended vertically from a rigid support When a body of mass M is attached to the lower end of wire the elongation of...
- Q 4 A wire of length 5 m is twisted through 30 at free end If the radius of wire is 1 mm the shearing strain in the wire is 1...
- Q Show that if Ap the change in density is very small com pared to the original density p then the relation p K can be replaced by the relation p...
- Q When a load of 10 kg is suspended from one end of a wire of length 1 m it increases in length by 0 1 cm If the Poisson s...
- Q 5 A soap bubble of radius R is surrounded by another soap bubble of radius 2R as shown Take surface tension S Then the pressure inside the smaller soap bubble...
- Q 4 The excess pressure inside a spherical drop of water is frour times that of another drop Then their respective mass ratio is 1 1 16 3 1 4 2...
- Q A heavy rope of mass m and length is placed on a smooth table It is pulled at both ends by applying force F of equal magnitude as shown Tension...
- Q 5 Two cylinders of same cross section and length L but made of two materials of densities d and d2 are connected together to form a cylinder of length 2L...
- Q 3 Enhancer 3 A charged spherical conductor having initial charge Q and radius R has a surface density of 0 7 cm 3 When the charge is increased by 0...
- Q The angle of contact does not depend upon 1 Temperature 3 Cohesive force 2 Soluble impurity 4 The inclination of surface in co
- Q 11 Figure shows the load extension curves for four wires A B C and D The dimensions of all the four wires are identical but materials of wire are different...
- Q symmetrically by three wire each of 2 m long of mass 15 kg is supported These at each end are of copper and middle one is of steel Young s...
- Q The water flows from a tap of diameter 1 25 cm with a of 5 x 10 5 m s The density and coefficient of visco S of water are...
- Q cm and 0 004 m formed of the same liquid surface tension 0 07 N m come together to form a double bubble Find the radius and the sense of...
- Q 6 A piece of wax weighs 18 03 g in air A piece of metal is found to weigh 17 03 g in water It is tied to the wax...
- Q C and Si both have same lattice structure having 4 bonding electrons in each However C is insulator where as Si is intrinsic semiconductor This is because A B C...
- Q 6K which rain renders to vertical windshield of automobile moving with 5 constant velocity of magnitude v 12 m s Consider that raindrops fall vertically with speed u 5 m...
- Q The pressure exerted by sea water of density 1025 kg m on a fish at a depth of g 10 m s is
- Q E A material has a shearing strength of 100 mp The force necessary to punch at 10mm dia hole through a plate of this material 10 mm thick is a...
- Q 29 A mild steel wire of length 2 meter cross sectional area A m is fixed horizontally between two pillars A small mass m kg is suspended from the mid...
- Q A wire of length 2 m and diameter 1 mm stretched so that its length increases by 6 mm the decrease in diameter of the wire is o 0 35...
- Q 7 A glass flask of volume 200 cm is just filled with mercury 20 C The amount of mercury that will overflow when the temperature of the system is raised...
- Q B 15m penic pressure can support a water column Olympiad 2014 stage C 5m A jet of water of cross sectional area A hits a plate normally with velocity v...
- Q 9 In an unbiased n p junction electrons diffuse from n region to p region because 1 holes in p region attract them 2 3 electrons travel across the junction...
- Q The lower surface of a cube is fixed On its uppe surface force is applied at an angle of 30 from its surface The change will be in its 1...
- Q 108 For an ideal gas a process xy is shown on P T diagram Which of the pressure temperature following is correct for the process y Doubt X 1 Internal...
- Q 2 The excess pressure inside a soap bubble is equal ho to an oil column of height 3 mm The total surface area of the soap bubble in contact with...
- Q 4 Two glass plates of width b are kept close to each other in water at a small distance d as shown in figure Density of water is p surface...
- Q 23 An ideal gas has adiabatic exponenty It contracts according to the law PV a where a is a positive constant For this process the Bulk modulus of the gas...
- Q Young modulus of elasticity of brass is 10 N m The increase in its energy on pressing a rod of length 0 1 m and cross sectional area 1 cm...
- Q 3 If p is density of water and B is Bulk modulus then energy density of water in a lake h metre deep is 1 3 pgh B pgh 4B...
- Q A 5 m long cylindrical steel wire with radius 2 x 10 3 m is suspended vertically from a rigid sup and carries a bob of mass 100 kg at...
- Q Adding detergents to water helps in removing dirty greasy stains This is because Read Page 153 It increases the oil water surface tension b It decreases the oil water surface...
- Q The density of a metal at a normal pressure is p Its density when it is subjected to an excess pressure P is p If B is the bulk modulus...
- Q 6 A 560N cyclist sits on a biycle seat and copresses the two seat springs The spring constant equals 2 2X10 4N m for each spring How much is each...
- Q Passage I Freezing point depression occurs when a substance solute is added to a solvent decreasing the solvent s freezing point The process can be monitored over a short range...
- Q Passage III One way to use the principle of density to isolate macromolecules from cell extracts is by separating out the various parts of a cellular extract using a density...
- Q Figure 1 shows a lightweight plank supported at its right end by a 7 0 mm diameter rope with a tensile strength of 6 0x 107 N m Figure 1...
- Q Given the following reaction CuO s H g Cu s H O g If 357 L of hydrogen gas are used to reduce copper II oxide at STP what mass...
- Q A concrete bridge is built of 345 cm long concrete slabs with an expansion joint between them The slabs just touch on a 115 F day the hottest day for...
- Q Calculate the mass of 3 7 L of CH4 at STP
- Q A disk between vertebrae in the spine is subjected to a shearing force of 530 N Find its shear deformation using the shear modulus of 1 0 x 10 N...
- Q The hanging wall of a fault has been displaced downward by 24 cm relative to the footwall and there has been a total horizontal displacement of 35 cm What is...
- Q acceleration of the mass after it falls 4 1 cm A 5 2 kg mass hung from a spring vibrates with a period of 1 2 s Calculate the spring...
- Q A horst is bounded on the east and west by two normal faults The fault plane of the west fault has a slope of 0 88 m m to the...
- Q Express the answer in scientific notation An ore deposit consisting of chert and hematite occurs in a deposit measuring 5 900 m long by 1 300 m wide by 57...
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