Please select a subject first
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Identify the process given in following passage and draw neat labelled diagram showing the process.
Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.
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Choose and write the correct option.
Which of the following astronauts travelled through space shuttle ‘Discovery’ first time?
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At which position will you keep an object in front of convex lens to get a real image smaller than the object? Draw a figure.
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Give scientific reasons.
While preparing dil. Sulphuric acid from concentrated conc. sulphuric acid in the laboratory the concentrated sulphuric acid is, add slowly to water with constant stirring.
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Observer the following diagram and answer the questions.
a) Which eye defect is shown in this diagram?
b) What are the possible reasons for this eye defect?
c) How this defect is corrected, write it in brief?

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Name the following diagram and explain the concept behind it.

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Rewrite the following table so as to match second and third column with first column.
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Column I
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Column II
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Column III
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(i) Myopia
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Old age problem
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Bifocal lens
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(ii) Presbyopia
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Nearsightedness
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Concave lens.
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State Fleming’s Right Hand Rule.
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Answer the following:
State the principles of the electric motor and electric generator.
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Answer the following question:
What is overloading? When does it occur? How can overloading be avoided?
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Anuja cannot see the blackboard writing but she can see nearby things.
(a) What is the eye defect she is suffering from?
(b) State the possible reason for her defect.
(c) How is it corrected
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Choose the correct option:
A conductor rod of length (l) is moving with velocity (v) in a direction normal to a uniform magnetic field (B). What will be the magnitude of induced emf produced between the ends of the moving conductor?
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Observe the given figure of Fleming’s Right Hand Rule and write the labels of A and B correctly.

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Observe the given figure of reactivity series of metals and answer the following questions:

Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
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The right-hand thumb rule is also called _______ rule.
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Which of the following scientist invented the rule of electromagnetic induction?
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Due to elongation of _______ and increase in curvature of the eye lens, a person cannot see distant objects clearly.
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In electrolytic reduction of alumina _______ is used as a cathode.
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