Which one of the following physical quantities does not have the dimensions of force per unit area ? April 17, 2025 by admin A. Stress B. Strain C. Youngs modulus D. Pressure
A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________? April 17, 2025 by admin A. FE B. (FE) C. FE2/L D. FE2
When a force is applied at one end of an elastic wire it produces at strain ∝ in the wire. If y is the youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by_________________? April 17, 2025 by admin A. Y∝ B. 2Y∝ C. Y∝/2 D. Y∝2
A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ? April 17, 2025 by admin A. 0.01J B. 0.02J C. 0.04J D. 1.0J
A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by_________________? April 17, 2025 by admin A. Stress/strain B. (stress/strain) C. Stress x strain D. (Stress / strain)
The ration stress to strain in youngs modulus of the material then tension is__________________? April 17, 2025 by admin A. Directly proportional to extension B. Directly proportional to strain C. Directly proportional to square of amplitude D. Inversely proportional to extension
A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________? April 17, 2025 by admin A. The extension of the wire is proportional to the force applied B. The weight of the wire is negligible C. The wire is not stretched beyond its elastic limit D. The cross sectional area of the wire remains constant
Formation of large molecule by joining small molecules is_________________? April 17, 2025 by admin A. Fusion B. Polymerization C. Crystallization D. Subtraction
The energy band occupied by the valence electrons is called___________________? April 17, 2025 by admin A. Energy state B. Valence band C. ve energy state D. conduction band
