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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.
A concave lens when given in air has a focal length of 0.4 m and has a refractive index of 3/2. Evaluate its focal length when immersed in water of refractive index 4/3?
The Time Base Control 3 Shows the effect of changing the time base control on the display when there is an input voltage varying in time when the frequency of the voltage is hi
Semi Conductors: Substance which are neither good Conductor, like metals nor very bad conductors like non metals are known as Semi conductors Examples of such substances are si
How is Specific Gravity defined? Specific Gravity, SG, is a unit less quantity that provides the scientist or engineers an idea of how dense a substance is compared to water. T
MANUFACTURING: Two processes are used manufacturing. Coated film: A mixture of carbon, filler and binder is coated on a ring of insulating material. The surface of the film is
What is Avalanche Breakdown Minority carriers, under reverse biased conditions, flowing through the junction acquires a kinetic energy that increases with increase
Describe the variation of the radius of bright fringe of Newton's rings with refractive index of the thin film enclosed between the glass plate and plan-convex lens when observed b
all
Energy Transformation for Downhill Skiing Downhill skiing is a typical describe of the relationship among work and energy. The skier starts at an elevated position, therefore p
Write a mathematical expression for deviation produced by a thin prism and illustrate the terms.
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