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Q. What are secondary cells? Give an example?
i) They are rechargeable.
ii) The chemical reactions which take place in secondary cells are reversible.
iii) The active materials which are used up when the cell delivers current can be reproduced by passing current through the cell in opposite direction. Instance lead acid accumulator and alkali accumulator.
What is artificial transmutation? Describe the experiment that led to the discovery of artificial transmutation? Why only high energy α - Particles were used in the discovery of a
Q. Explain the Law of Machines? Answer:- Machines which are utilized to lift a load are governed by the Law of machines which states that the effort to be applied on the m
For the system shown below the gain, G, of block A is variable and can be set as low as 100 and as high as 500. The only problem with block A is that its gain fluctuates with high
This phylum includes
(a) A current of 15A fl ows through a load having a resistance of 4Ω . Determine the power dissipated in the load. (b) A wattmeter, whose current coil has a resistance of
At certain sharply explained wavelengths, the power of X-rays is very large as marked K alpha, K beta .... As shown in figure. These X-rays are called as property of X-rays. At oth
what is total internal reflection ?
As CPH is a boson, does it has structure? Answer; a CPH is tiny energy and it is not a boson. When a CPH takes spin, then it converts to graviton.
what should be the length of a nichrome wire of resistance 45 ohms if the length of a similar wire is 60 cm and resistance is 25 ohms
A toy car with a mass of 0.75 kg is pulled3.2 m across the floor with a constant force of 110 N. If 67 J of work is done, what is the upward angle of the force?
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