The curie temperature is that at which ____________________? A. Semi-conductor becomes conductorsB. Ferromagnetic becomes paramagnetic C. Paramagnetic becomes diamagnetic D. Metals become super conductor
Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________? A. Stiffness B. Toughness C. ExtensionD. Deformation
A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________? A.…
Materials that undergo plastic deformation before breaking are called __________________? A. BrittleB. Ductile C. Amorphous D. Polymers
A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is___________________? A. 0.025J…
A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ? A. 2×108 Nm-2B. 5×106…
What is the SI unit of modulus of elasticity of substance ? A. Nm-2 B. Jm-2 C. Nm-1 D. Being a number it has no unit.
Energy needed to magnetize and demagnetize is represented by _________________? A. Hysteresis curveB. Hysteresis loop area C. Hysteresis loop D. Straight line
Very weak magnetic fields are detected by___________________? A. Squids B. Magnetic resonance imaging (MRI) C. Magnetometer D. Oscilloscope
On the basis of band theory of solids the semiconductors have _____________________? A. A party filled valence band and totally empty conduction band B. A completely filled valence band a totally empty conduction band and a very wide forbidden bandC.…