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Give Scientific reasons: In the electr...

Give Scientific reasons:
In the electric equipment's producing heat e.g. iron, electric heater, boilers, toaster etc. and alloy such as Nichrome is used, not pure metal

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Give scientific reasons: The coils in heating devices such as a toaster and electric iron are made of an alloy such as Nichrome, rather than a pure metal.

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CHETANA PUBLICATION-EFFECTS OF ELECTRIC CURRENT-EXAMPLE
  1. Distinguish between : Direct current and Alternating current.

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  2. Give Scientific reasons: Tungsten metal is used to make a solenoid t...

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  3. Give Scientific reasons: In the electric equipment's producing heat ...

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  4. Give Scientific reasons: For electric power transimssion,copper or a...

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  5. Give Scientific reasons: In practice the unit KWh is used for the me...

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  6. Why are carbon brushes used?How do these work?

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  7. Give Scientific reasons: Iron is a conductor of electricity, but whe...

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  8. Give Scientific reasons: The material used for making fuse wire has ...

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  9. If lines of force pasing thrugh the coil are increased,will current be...

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  10. What is overloading?

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  11. How does short circuit form?What is its effect ?

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  12. What is Solenoid?Compare the magnetic field produced by a solenoid wit...

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  13. Describe with a neat diagram : Volmeter

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  14. How can we write mechanical power in a manner similar to the electrica...

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  15. Derive joules Law with the help of a neat circuit diagram.

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  16. In the aobve circuit,if the resistor is replaced by a motor,in which f...

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  17. How will you increase the strength of magnetic field in an electromagn...

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  18. Write a note on Galvanometer.

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  19. What do you mean by earthing?

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  20. State the factors on which the strenght of the magnetic field of a cir...

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