Description : Derive an expression for strain energy per unit volume of the material of a wire.
Last Answer : Derive an expression for strain energy per unit volume of the material of a wire.
Description : When a wire is stretched to double in length, the longitudinal strain produced in it is (a) 0.5 (b) 1.0 (c) 1.5 (d) 2.0
Last Answer : b) 1.0
Description : Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 1 : 4
Last Answer : Option A
Description : Modulus of resilience is defined as a) Strain energy per unit volume b) Strain energy per unit area c) Independent of strain energy d) None of the mentioned
Last Answer : a) Strain energy per unit volume
Description : If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (fs/N) (A) 1/2 (B) 1/3 (C) 1/4 (D) 1/5
Last Answer : (C) 1/4
Description : A rubber band originally 30cm long is stretched to a length of 32cm by certain load. What is the strain produced?
Last Answer : A rubber band originally 30cm long is stretched to a length of 32cm by certain load. What is the strain produced?
Description : A wire gets stretched by 4mm due to a certain load. If the same load is applied to a wire of same material
Last Answer : A wire gets stretched by 4mm due to a certain load. If the same load is applied to a wire of ... first wire. What will be the change in its length?
Description : Four wires of the same material and dimensions as under are stretched by a load of same magnitude separately. Which of them will be elongated maximum? (a) wire of 3m length and 1.5 mm diameter (b) ... and 2mm diameter (c) wire of 2m length and 2mm diameter (d) wire of 1m length and 1mm diameter
Last Answer : Ans:(a)
Description : If S is stress, Y is Young’s modulus of material of a wire, the energy stored in the wire per unit volume is (a) 2Y/S (b) S/2Y (c) 2S2Y (d) S2/2Y
Last Answer : Ans:(d)
Description : A telephone wire 125m long and 1mm in radius is stretched to a length 125.25m when a force of 800N is applied.
Last Answer : A telephone wire 125m long and 1mm in radius is stretched to a length 125.25m when a force of ... the value of Young's modulus for material of wire?
Description : A steel wire having cross sectional area 1.2 mm is stretched by a force of 120 N.
Last Answer : A steel wire having cross sectional area 1.2 mm is stretched by a force of 120 N. If a ... is produced in the wire, calculate the Poisson's ratio.
Description : A wire of resistance `48 Omega` is uniformly stretched until its new length becomes 4 times the original length. Find its new resistance.
Last Answer : A wire of resistance `48 Omega` is uniformly stretched until its new length becomes 4 times the original length. Find its new resistance.
Description : A cylindrical wire is stretched to increase its length by 10%. Calculate the percentage increase in resistance.
Last Answer : A cylindrical wire is stretched to increase its length by 10%. Calculate the percentage increase in resistance.
Description : A metallic wire of length 1 m is stretched to duble its length. Calculate the ratio of its initial and final resistances assuming that there is no cha
Last Answer : A metallic wire of length 1 m is stretched to duble its length. Calculate the ratio of its ... there is no change in its density on stretching.
Description : A wire of resistance `4 Omega` is stretched to twice its original length. The resistance of stretched wire would be
Last Answer : A wire of resistance `4 Omega` is stretched to twice its original length. The resistance of stretched wire would ... Omega` C. `8 Omega` D. `16 Omega`
Description : If a wire is stretched to four times its length, then the specific resistance of the wire will
Last Answer : If a wire is stretched to four times its length, then the specific resistance of the wire will A. ... times C. become 16 times D. remain the same
Description : A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area of cross-section gets halved. Now, th
Last Answer : A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area ... Omega` C. `1 Omega` D. `4 Omega`
Description : A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the den
Last Answer : A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its ... 2` C. `4 : 1` D. `1 : 4`
Description : How t has strings made of metal wire plastic or gut that are stretched across the bottom of the instrument?
Last Answer : Need answer
Description : Compute the maximum shearing stress developed in a phosphor bronze spring having mean diameter of 200 mm and consisting of 24 turns of 20-mm diameter wire when the spring is stretched 100 mm. and G = 42 GPa. a. 51 MPa b. 31.89 MPa c. 80 MPa d. 70 MPa
Last Answer : b. 31.89 MPa
Last Answer : Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is 4 r.
Description : Resilience of spring is (a) Strain energy per unit length (b) Strain energy per unit area (c) Strain energy per unit mass (d) None
Last Answer : (d) None
Description : The deformation per unit length is called (a) Strain (b) Stress (c) Elasticity (d) None of these
Last Answer : (a) Strain
Description : Gauge factor of strain gauge is defined as the ratio of per unit change in the ______.
Last Answer : Gauge factor of strain gauge is defined as the ratio of per unit change in the resistance to the per unit change in the length of the element.
Description : Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per unit length of wire is same throughout the length
Last Answer : Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per ... . If Assertion is false but Reason is true.
Description : The strain energy due to volumetric strain (A) Is directly proportional to the volume (B) Is directly proportional to the square of exerted pressure (C) Is inversely proportional to Bulk modulus (D) All the above
Last Answer : (D) All the above
Description : Strain energy of a member may be equated to (A) Average resistance × displacement (B) ½ stress × strain × area of its cross-section (C) ½ stress × strain × volume of the member (D) ½ (stress)2 × volume of the member + Young's modulus E
Last Answer : (D) ½ (stress)2 × volume of the member + Young's modulus E
Description : State Hooke’s law. Draw a labelled graph of tensile stress against tensile strain for a metal wire
Last Answer : State Hooke's law. Draw a labelled graph of tensile stress against tensile strain for a metal wire up ... the region in which Hooke's law is obeyed.
Description : Explain stress-strain diagram for a wire under continuously increasing load.
Last Answer : A graph or diagram of stress and strain is shown as above. OE Portion is straight line which indicates that stress is proportional to strain. Therefore the wire obeys Hooke's law upto the point ... point D is ultimate stress point. It is the max. stress the wire is capable of with standing.
Description : The advantage of a semiconductor strain gauge cover the wire round strain gauge is that
Last Answer : The advantage of a semiconductor strain gauge cover the wire round strain gauge is that it is more sensitive
Description : If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is : (A) 2.8 (B) 2.6 (C) 4.6 (D) 3.6
Last Answer : If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is : 4.6
Description : The springs A and B are identical except that A is stiffer than B, that is KA > kB. If both the springs are stretched by the same amount a.more work will be expended on A than B b.same work will be expended in both springs. c.less work will be expended on A than B d.107 dynes e.
Last Answer : a. more work will be expended on A than B
Description : The total strain energy for a unit cube subjected to three principal stresses is given by? a) U= [(σέ) 1 + (σέ) 2+ (σέ) 3]/3 b) U= [(σ12+σ22+σ32)/2E] – (σ1σ2+σ2σ3+σ3σ1)2μ c) U= [(σέ) 1 + (σέ) 2+ (σέ) 3]/4 d) None of the mentioned
Last Answer : b) U= [(σ12+σ22+σ32)/2E] – (σ1σ2+σ2σ3+σ3σ1)2μ
Description : 9. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is (A) More (B) Equal (C) Less (D) Double
Description : The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μm is (A) 6.35 kWh/ton (B) 9.0 kWh/ton (C) 18 kWh/ton (D) 25.4 kWh/ton
Last Answer : (C) 18 kWh/ton
Description : Pick out the wrong statement. (A) Higher specific gravity of petroleum products means higher C/H ratio (B) Aromatics have lower specific gravity than corresponding paraffins (C) Hydrocarbons of low ... of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight
Last Answer : (B) Aromatics have lower specific gravity than corresponding paraffins
Description : Bernoulli's principle states that, for streamline motion of an incompressible non-viscous fluid: A. the pressure at any part + the kinetic energy per unit volume = constant B. the kinetic ... + the kinetic energy per unit volume + the potential energy per unit volume = constant
Last Answer : the pressure at any part + the kinetic energy per unit volume + the potential energy per unit volume = constant
Description : Calculate the energy stored per unit volume in a dielectric medium due to polarisation when P = 9 units and E = 8 units. a) 1.77 b) 2.25 c) 36 d) 144
Last Answer : c) 36
Description : Each term of the Bernoulli's equation written in the form, (p/ρ) + (g/gc ). Z + (v 2 /2gc ) = constant, represents the total energy per unit (A) Mass (B) Volume (C) Specific weight (D) None of these
Last Answer : (A) Mass
Description : The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to (a) E/3 (b) E/2 (c) 3E/4 (d)2E/3 (e) 5E/4.
Last Answer : Answer : d
Description : Energy stored per unit volume inside the solenoid is called: a. Energy density b. Charge Density c. Mass density d. Volume charge density
Last Answer : energy density is correct
Description : Pick up the correct statement from the following: (A) Absolute humidity at a given temperature is equal to weight of moisture present in a unit volume (B) Relative humidity is the ratio of ... of vapours which could be contained at the same temperature when fully saturated (D) All the above
Last Answer : Answer: Option D
Description : For aluminium, as compared to copper, all the following factors have higher values except (a) specific volume (6) electrical conductivity (c) co-efficient of linear expansion (d) resistance per unit length for same cross-section
Last Answer : (6) electrical conductivity
Description : A transmission line consisting of two conductors that have equal resistance per unit length. A. Unbalanced line B. Open-wire line C. Balanced line D. Coaxial line
Last Answer : C. Balanced line
Description : The spring index is, (A) Ratio of wire diameter to mean coil diameter (B) Force per unit cross-sectional area of spring (C) Ratio of mean coil diameter to wire diameter (D) Force required to produce unit deflection
Last Answer : (C) Ratio of mean coil diameter to wire diameter
Description : The stiffness of spring is, (A) Deflection per unit of axial force (B) Force per unit cross-sectional area of spring (C) Ratio of mean coil diameter to wire diameter (D) Force required to produce unit deflection
Last Answer : (D) Force required to produce unit deflection
Description : The unit of measurement is per quintal for the following: (A) Collapsible gates with rails (B) Rolling shutters (C) Expanded metal wire netting (D) M.S. reinforcement of R.C.C. works
Last Answer : (D) M.S. reinforcement of R.C.C. works
Description : The modulus of rigidity is the ratio of (1) Longitudinal stress to longitudinal strain (2) Volume stress to volume strain (3) Shearing stress to shearing strain (4) Tensile stress to tensile strain
Last Answer : (3) Shearing stress to shearing strain Explanation: In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S , is defined as the ratio of shear stress to the shear ... the case of an object that's shaped like a rectangular prism, it will deform into a parallelepiped.
Description : When a gas or a liquid is subjected to an increased pressure, the substance contracts, the bulk strain is defined as A. final volume ⁄ original volume B. final pressure ⁄ original pressure C. change in volume ⁄ original volume D. original volume ⁄ change in volume
Last Answer : change in volume ⁄ original volume
Description : cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is (A) 0 (B) 0.33 (C) 0.44 (D) 0.25
Last Answer : Option C