Ask a Teacher

Search

CBSE->Plus 2 Biology Science Questions

Total Questions 190
Calculate the conductivity of resistance of 0.01ohm if the area of cross section is 10^-4m2 and length 10cm.
A copper wire is stretched to make it 0.1% longer.What is the percentage change in resistance.
What is the work done in rotating a dipole from its unstable equilibrium to stable equilibrium ? Does the energy of dipole increase or decrease ?
what is frenkel defect,schottky defect,f- centred ?
an electron & proton are released from rest in a uniform electrostatic field.Which will have larger acceleration?
Through what potential would one need to accelerate an electron in order to achive a velocity of 60% of that of light.,starting from rest.
when will a dipole be in stable and unstable ?
what is meant by amorphous solids ?
An electron is released in a region where the electric field is along the positive x direction and has a strength of 3600N/C.What is the acceleration of the electron in the electric field.
The electric field due to a positive charge at a distance 2m is 4N/C.Its magnitude at a distance of 4m will be_______________
For what value of electric field E,an electron placed in it would experience an electric force equal to its weight.
A charge Q is divided into q & (Q-q).For maximum force between them,the ratio Q/q must be____________
What is meant by Juvenile phase?
the amount of work done in pumping water out of a cubical vessel of height 1 m is nearly (g=10m/s2)?
what is mycorrhizae?
A steel cable with a radius of 1.5 cm supports a chairlift at a ski area. If the maximum stress is not to exceed 108 N/m2. What is the maximum load the cable can support?
A steel wire of length 4 to 7m & cross sectional area 3*10-5m2 stretches by the same amount as a copper wire of length 3.5m & cross sectional area of 4*10-5m2 under a given load.What is the ratio of the young's modulus of steel to that of copper?
How much should the pressure oo a litre of water be changed to compress it by 0.1%.
An electric bulb of volume 250cm3 was seated off during manufacture at a pressure of 10-3 mm of Hg at 27 degree C. Find the number of molecules in the bulb.
A narrow capillary glass tube of radius 1 mm is dipped in mercury whose angle of contact with glass is 140 degree.Calculate the capillary depression of mercury in the tube.Surface tension of mercury is 465 x 10-3 N/m & its density is 13.6 x 1000 kgm-3.