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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 the net force on a conductor of length l carrying current 'i' when it is situated in a magnetic field of induction B? When is it maximum? State and explain Fleming's l
Fast neutrons can be changed into slow neutrons by certain materials known as moderator's when last moving neutrons pass by a moderator, they combine with the molecules of the mod
Derive expression for total power consumed when three appliances of power p1 p2 nd p3 are connected in series.
When royce was 10 years old he had a mass of 30kg by the time he was 16 years old his mass increase to 60kg how much larger is the gravitational force between royce and earth at a
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Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.
What is ground wave?
Define the physical significance of damping coefficient and how can we caluclate it? What is its unit
In expressions of the conventional graphical representation of an electric field which of the following conceptual statements best represents what is meant by the electric flux thr
Similarities in Construction of MOSFET and JFET (i) JFET is a three terminal semiconductor device (source, drain and gate) in which current conduction is by majority carriers
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