The process by which nuclei having low masses are united to form nuclei with large masses is :
a. chemical reaction
b. nuclear fission
c. nuclear fusion
d. chain reaction
1 Answers
When the gene product is required in large amounts, the transformed bacteria with the plasmid inside the bacteria are cultured on a large scale in an
(a) To maintain the cells in their physiologically most active log/exponential phase. (b) Temperature, pH, substrate, salts, vitamins, oxygen (Any 4)
2 Answers 2 views
Find the equation of parabola (i) having focus at (0,-3) its directrix is y = 3. (ii) having end points of latus rectum (5,10) and (5,10) and which op
(i) Here, focus S(0,-3) and directrix y=3 are at same distance from origin is vertex of the parabola and parabola opens downwards. So, we consider equation `x^(2)=-4ay`. Here focus is...
2 Answers 1 views
A particle (A) having charge Q and mass m is at rest and is free to move. Another particle (B) having charge q and mass m is projected from a large di
Correct Answer - (a). `(1)/(4)m u^(2)` (b). A moves to right with velocity u. B is at rest .
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Which of the followings can excite a hydrogen atom in ground state? (i) A photon having 11 eV energy (ii) A neutron having `11 eV` kinetic energy (iii
Correct Answer - An electron having `11 eV` kinetic energy.
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An electron approaches a fixed proton from a large distance with a kinetic energy of 12.2 eV. The electron gets captured by the proton to form a hydro
Correct Answer - `1217 Å`
2 Answers 1 views
A sample contains two isotopes -one stale and the other unstable. Number of stable nuclei is equal to `N_(s)` and number of unstable nuclei is equal t
Correct Answer - `N_(s)//N_(u)=1//3`
2 Answers 1 views
If the nucleus of hydrogen fuses with a nucleus of lithium to form two helium nuclei, (a) write down the nuclear reaction equation (b) find the releas
Correct Answer - `[0.263 xx 10^(-11) J, 37.26 xx 10^(11)]`
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How does construction of dams and canals create employment in large numbers in rural areas? (a) Large number of engineers are needed
Answer is : (c) Adjustment of large number of unskilled labourers.
2 Answers 16 views
Large force always produces large change in momentum on a body than a small force. Is this correct?
No. From Newton’s second law, we have. \(\frac{dP}{dt}=F\) …. (i) dP = Fdt …. (ii) From equation (ii), we can infer that a small force acting for a longer time can produce same change...
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Pyro chemical process means process which takes place in the presence of ……………..
Correct option is C) heat
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