Physics question and answers for April 09, 2024
- Q A pendulum consists of a rod of mass 2 kg and length 1.0 m with a solid sphere at one end with mass 0.3 kg and radius 20 cm (see...
- Q Deformation and Breaking of a Bone If a compressive force of 3 x 104 N is exerted on the end of 20 cm long bo area 3 6 cm Find...
- Q A rod of length 2m at 0 C and having expansion coefficient a 3x 2 10 C where x is the distance in cm from one end of rod The...
- Q A proton and an electron are accelerated by the same potential difference Let and X denote the de Broglie wavelengths of the electron and the proton respectively O A Ap...
- Q Two wires of the same length and same area of cross section are suspended as shown Their Young s moduli are in the ratio 2 3 Blocks are in equilibrium...
- Q The densities of wood and benzene at 0 C are 880 kg mand 900 kg m 3 respectively The coefficients of volume expansion of wood is 1 2 x 10...
- Q An Air Bubble rising up inside a Liquid An air bubble of radius 1 cm rising at a steady rate of 0 5 cm s through a liquid of density...
- Q Pressure Difference in a U Tube The internal radius of one arm of a U shaped capillary is 1 mm and that of oth is 2 mm One arm of...
- Q If water in a lake were to behave like other liquids then in extremely cold weather it would freeze A from top to bottom B from bottom to top C...
- Q 39 The surface energy of a drop is E If one thousand such drops coalesce to form a large drop then its surface energy is E The ratio is E...
- Q Calculate the linear electron density of Gallium Arsenide in which its width is 10 nm The sub band values of the GaAr are n 2 n 2 2 6 2...
- Q Person property and face camera 69 A copper wire of length 3m and 1mm diameter is subjected to a tension of 5N Calculate the elongation produced if the young s...
- Q BPH2101 PHYSICS 35 The body will regain it is previous shape and size only when the deformation caused by the external forces is within a certain limit What is that...
- Q are made of materials whose coefficient of linear expansions are a1 and 2 If the difference between two lengths is independent of temperature l l2 1 2 INCORRECT
- Q 1 C 22 A wire of length area of cross section A and weight w is subjected to external force 2w If Y is Young s modulus then total extension...
- Q A suspended long metal wire is stretched a small distance x by a load W in newton suspended at the other end Select the best answer out of the following...
- Q The relation between y n and K for a elastic material is 1 1 K 3y 1 3 Y 1 1 37 3K 3K 1 9K 1 91 2 4...
- Q 4 inversely proportional to the square of the radius of sphere A sphere is dropped gently into a medium of infinite extent As the sphere falls the force acting downwards...
- Q 1 V 25 2 5 V 3 V 5 4 25 V If work done in stretching a wire by 1mm is 2J the work necessary for stretching another wire...
- Q A steel wire is suspended vertically from a rigid support When loaded with a weight in air it expands by L and whe the weight is immersed completely in water...
- Q Two wires A and B of same length and of the same material have the respective radii r and r Their one end is fixed with a rigid support and...
- Q Two wires one of steel Ysteel 2 x 1011 N m and the other of copper Ycu 10 1 N m have same length and radii If on applying a...
- Q 41 Young s modulus of a wire of length 1 and radius r is Y I Length of the wire is reduced to and radius also reduced to a r...
- Q on the radius of the spher 27 The radius of a metal sphere at room temperature T is R and the coefficient of linear expansion of the metal is a...
- Q In a grid iron pendulum there are 3 iron rods and 4 brass rods Length of each brass rod is 50 cm a of iron is 12 x 10 6...
- Q 20 A wire Y 2x 10 N m has length 1 m and area 1 mm the work required to increase its length by 2 mm is b 40 J...
- Q When a massive string mass length is hung from two supports the shape it forms is called catenary e e x ex then find out tension at lowest The equation...
- Q A ball falling in a lake of depth 200 m shows 0 01 decreas in its volume at the bottom What is the bulk modulus of th material of the...
- Q gas 24 At what temperature the rms velocity of molecules would be double of its value at NTP if upressure is remaining constant b 819 K a 819 C C...
- Q You have just purchased a diamond ring claimed to be a pure diamond The ring weighs 20 g and displaces 8 cm on water when fulled immersed Is this a...
- Q A rod of mass Mis placed over smooth horizontal surface Forces 2F F are applie at the ends of the rod as shown If length cross sectional area and Young...
- Q 3 10 A force of 1000 newton doubles the length of cord having cross sectional area 1 mm Th Young s modulus of the material of the cord is 1...
- Q b Considering the equilibrium of the water find the resultant force exerted by the sides of the glass vessel on the water Atmospheric pressure 1 0 105 N m Density...
- Q A 1000 kg lift is tied with metallic wire of maximum safe stress of 1 4 x 108 N m If the maximum acceleration of the lift is 1 2...
- Q A block of mass M area of cross section A and length is placed on smooth horizontal floor Two forces F 5N and F 3 N are applied on the...
- Q The length of an elastic string is X m when the tension is 8N and Y m wh the tension is 10 N The length in metres when the tension...
- Q A rope of length L is kept along x axis such that its one end is at the origion as shown in the figure An external force is applied on...
- Q A plate of mass m and cross sectional area A is moved through a room in which a uniform cloud of dust particles is moving with a velocity v The...
- Q A cylindrical string is used in guitar The string is to be made of 11 0 g and density of string is 5 x 10 kg m The string ca...
- Q A Searle s experiment a wire of diameter d 0 060 cm is used to find its young s modulus The length of given wire is L 200 cm and...
- Q A light rod is suspended by two elastic strings as shown in the figure A block of mass m is hung at distance from end A such that rod remains...
- Q surface of liquid has spherical shape of radius of curvature R Now sa iquid is placed in a large spherical glass container of radius R If surface iquid container in...
- Q A and Al are the elongation of wire 1 and 2 respectively due to weigh AL 44 2 d then find the value of 2Y A 2L Symbol have their...
- Q A uniform rod of mass M and length L is hanging freely from a roof as shown B is the mid point of rod If SA SB are the stress...
- Q Calculate the force required to punch a hole of 30 mm diameter in a metal plate of 20 mm thickness The permissible shear stress in the material and corresponding factor...
- Q A wire length L area of cross section A is hanging from a fixed support The len gth of the wire changes to L1 when ma ss M is suspend...
- Q 71 A 500 watt bulb is placed at the centre of a perfectly black sphere of radius R 1 metre The approximate pressure experienced by the walls of the sphere...
- Q A bottle has an opening of radius a and length b A cork of length b and radius a Aa where Aa a is compressed to fit into the opening...
- Q A bar made of material whose Young s modulus is equal to E and Poisson s ratio to u is subjected to the hydrostatic pressure p Find the relationship between...
- Q stic potential energy 1 An iron bar of length L cross section A and Young s modulus Y is pulled by a force F from both the ends so as...
- Q Area A Y Area 2A 2Y L Massless rod At what position should a mass m be suspended on the massless rod so as to produce 1 equal stress in...
- Q A metallic wire is stretched by suspending weight to it If a is the longitudinal strain and is its Young s modulus of elasticity the elastic potential energy per unit...
- Q Here graph is plotted between stress and strain for two wire A and B made of different material Select the correct statement on the basis of graph given Young s...
- Q Two spherical balls of radius 2r and r both having density o are tied up with light string and released in a viscous fluid of density po with the rope...
- Q The radius of a sphere is found to have reduced by 0 01 when measured at a depth H of sea If the bulk modulus of elasticity of the material...
- Q 5 A thin soap film is attached to a light rod in a massless frame as shown in the figure if the length of the rod is 50cm and the...
- Q Two wires of equal cross sectional area and length L and 2L are suspended as shown in figure Their Young s modulli are Y and Y respectively The equivalent Young...
- Q Q8 Define stress What is the SI unit of stress Consider two metallic wires P and Q of the same length and material The area of the cross section of...
- Q 2 58 In producing chlorine through electrolysis 100 W power at 125 V is being consumed How much chlorine per min is liberated ECE of chlorine is 0 367 10...
- Q Two identical rods P and Q each of cross sectional area A length L and Young s modulus Y are placed on smooth horizontal surface They are acted by horizontal...
- Q By inserting a capillary tube upito a depth I in water the water rises to a heighth above the surface of the lower end of the copillary is closed inside...
- Q Two thin wires A and B of equal length L and equal cross sectional area A and masses M and M respectively are joined end to end and suspended as...
- Q want to use a steel cable to tow your car m 2400 kg The cable is solid steel with a length of 13 m and diameter of 3 cm If...
- Q 5 A drop of olive oil of radius 0 25mm spreads into a circular film of radius 5cm on the water surface Estimate the thickness of the film 1 8...
- Q Problem 3 An object of mass 0 500 kg is connected to a horizontal spring The object is pulled 25 0 cm and released from rest The object then oscillates...
- Q completely filled with 32 A glass vessel of volume 32 liquid and its temperature is raised by AT Wh volume of the liquid will overflow Coefficient of linear expansion of...
- Q The bars OA and OB of lengths 4m and 6m respectively are connected to each other by one of its ends by means of a rigid element and articulated supports...
- Q An air bubble at the bottom of a lake 40 0 m deep mas a volume of 1 23 cm Part A If the temperature at the bottom is 5...
- Q 10 The variation of magnetic susceptibility X for a diamagnetic material with temperature is best represented by which of the following curve with respect to temperature variations 11 1 3...
- Q A metallic wire of length and diameter 300 cm and 0 1 cm respectively is stretched by a load of 10 kg Young s modulus and Poisson s ratio for...
- Q The water flows from a tap of diameter 1 25 cm with a rate of 5 x 10 5m s 1 The density and 3 coefficient of viscosity of water...
- Q a When two soap bubbles of different radii coalesce some portions of the surfaces make a common surface At any point on the circumference of a B and y Wha...
- Q Four wires of the same material are stretched by 34 the same force The dimensions of wire are as given below The one which has the minimum elongation has 1...
- Q In Searle s experiment which is used to find Young s Modulus of elasticity the diameter of experimental wire is D 0 05 cm measured by a scale of least...
- Q 2 A steel wire of length 2 0 m is stretched through 20 mm The cross sectional area of the wire is 40 mm Calculate the elastic potential energy stored...
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