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_________________?
(A) FE
(B) (FE)
(C) FE2/L
(D) FE2
Which one of the following physical quantities does not have the dimensions of force per unit area ?
(A) Stress
(B) Strain
(C) Youngs modulus
(D) Pressure
Which of the following substances posses the highest elasticity ?
(A) Rubber
(B) Steel
(C) Glass
(D) Copper
Biomass can be converted into fuels by____________________?
(A) direct combustion
(B) fermentation
(C) both A and B
(D) none of these
________________ cells converts solar energy into electrical energy?
(A) rotory
(B) photovoltaic
(C) galvanic
(D) non of these
Geothermal energy is a _______________________ source of energy?
(A) non-renewable
(B) stable
(C) renewable
(D) none of the above
Propulsion force of a rocket is____________________?
(A) non-conservative force
(B) conservative force
(C) both A and B
(D) none of these
The area under the force displacement graph represents__________________?
(A) area
(B) work done
(C) power
(D) none of these
If the density of atoms remain same along any direction in a crystal is called__________________?
(A) Symmetry
(B) Homogeneity
(C) Isotropy
(D) Cleavage