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Draw a graph showing the variation of resistivity with temperature for nichrome. Which property of nichrome is used to make standard resistance coils?

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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (SHORT ANSWER QUESTIONS)
  1. Explain with the help of a graph the variation of conductivity with te...

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  2. Write two differences between ohmic circuit and non-ohmic circuit.

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  3. Draw a graph showing the variation of resistivity with temperature for...

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  4. Define the term resistivity of conductor. Give its SI units. Show that...

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  5. If n resistors each of resistance r are connected to get (i) maximum p...

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  6. (a) How will you represent a resistance of 3,700 + 10% ohm by a colour...

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  7. (a) A wire of resistance R, length l and area of cross-section A is cu...

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  8. State Joule's law of heating by electric current. Name the materials u...

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  9. The circuit shown in the diagram contains a battery "B" a rheostat "Rh...

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  10. Define internal resistance of a cell. Prove that r ~= ((E)/(V) - 1)R, ...

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  11. What is emf of a cell? On what factors does its value depend?

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  12. (a) Derive a relation between the internal resistance, emf and termina...

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  13. State the two Kirchhoff's laws.

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  14. A number of indentical cells, n, each of emf epsilon, internal resist...

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  15. State Wheatstone bridge principle and deduce it using Kirchhoff's rule...

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  16. How will you infer with the help of an experiment that the same curren...

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  17. With the help of circuit diagram, explain how a meter bridge can be us...

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  18. Explain the principle of Potentiometer. Draw the labelled circuit diag...

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  19. Write any two conditions when Ohm's Law fails?

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  20. Draw the circuit diagram of a potentiometer to determine the internal ...

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