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Varun Banda 8 years ago
Science City, Kolkata is the largest science centre in the Indian subcontinent under National Council of Science Museums, Ministry of Culture, Government of India, is at the crossing of Eastern Metropolitan Bypass and J B S Haldane avenue, Kolkata.
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Amar Kumar 8 years ago
An electric current is a flow of electric charge.In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma).
Electric current is defined as the rate at which charge flows through a surface (the cross section of a wire, for example)..It is the flow of electric charge across a surface at the rate of one coulomb per second.
The SI unit for measuring an electric current is the Ampere.
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Amar Kumar 8 years ago
Gene:A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins.
A gene is a sequence of DNA or RNA which codes for a molecule that has a function. The DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function
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Arnab Dutta 8 years ago
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Chandrashekhar Wankhede 7 years, 11 months ago
Sn = (n/2)(2a+(n-1)d)
S12= (12/2)(2a+(12-1)d)=12a+66d
Similarly
S8= (8/2)(2a+(8-1)d)= 8a+28d
S4= (4/2)(2a+(4-1)d) = 4a+6d
RHS = 3(S8-S4)= 3(8a+28d-4a-6d)
RHS =3(4a+22d) = 12a + 66d = LHS
Hence Proved
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