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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.
Factors on which Magnetic Force Depends: The magnetic force depends on following factors: 1. Nature of Pole: Like poles repel each other and unlike pole attract each other.
Q. What are the uses of an electron microscope? Uses of electron microscope: (i) It is utilized in the industry to study the surface of metals, structure of textile fib
Inertia with a stone You will require a stone weighing about 1 kg for this experiment. Wrap a length of heavy string about the stone. Now, on opposite sides of the stone, join
how spinning top spins 360 degree
please explain newtons first law of motion
Cosmological redshift An effect where light emitted through a distant source seems redshifted due to the expansion of spacetime itself.
Maximum Height of Ball A solid ball is revolve toward a ramp. How elevated will it be when it stops and begins to roll back down? The linear kinetic energy like the bal
Explain about the term step index fibre. Step index fibre: Into a step index fibre, the refractive index keeps constant throughout the core and decreases at the core-claddin
A rigid object is a body with a exact and unchanged size and shape i.e. a body is said to be rigid if the distance among any two particles of the body remains invariant.
what is plane diffraction grating?
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