Question

a resistor has resistance of 176 ohms.How many of these resistor should be connected in parallel so that there combination draws a current of 5 amperes from a 220 Volt supply line ?​

Answer 1

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Answer 2

Answer:

a) Barium Chloride solution is mixed with copper sulphate solution

and a white precipitate is observede

b) On heating Copper powder in air in a china dish, the surface of

coppers powder turns black

c) On heating green coloured ferrous sulphate crystals, reddish brown

solid is left and a smell of gas having odour of burning sulphur is

experienced

d) Iron nails when let dipped in blue copper sulphate solution become

brownish in colour of copper sulphate fades away.

e) Quicklime vigorously with water releasing a large amount of heat.