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Explain the application of heating effec...

Explain the application of heating effect of electric current in a fuse.

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A fuse protects electrical circuits and appliances by stopping the flow of electric current when it exceeds a specifled value. For this, it is connected in series with the appliance (or circuit) to be protected. A fuse is a piece of wire made of an alloy of low melting point (e.g. an alloy of lead and tin). If a current larger than the specified value flows through the fuse, its temperature increases enough to melt it. Hence, the circuit breaks and the appliance is protected from damage.
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-EFFECTS OF ELECTRIC CURRENT -Answer the following questions :
  1. How does the short circuit form? What is its effect?

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  2. What is overloading? When does it occur? What does it cause? How can o...

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  3. Explain the application of heating effect of electric current in a fus...

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  4. State the conclusions that can be drawn from Oersted's experiment.

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  5. What is the effect on the magnetic needle in Oersted's experiment, whe...

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  6. What is the effect on the magnetic needle in Oersted's experiment, whe...

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  7. What is the effect on the magnetic needle in Oersted's experiment, whe...

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  8. What is the effect on the magnetic needle in Oersted's experiment, whe...

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  9. What is the effect on the magnetic needle in Oersted's experiment, whe...

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  10. State the factors on which the magnitude of the magnetic field due to ...

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  11. State the right hand thumb rule.

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  12. With a neat labelled diagram, describe the pattern of magnetic lines o...

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  13. What is a solenoid ? Compare the magnetic fleld produced by a solenoid...

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  14. Write Fleming's left hand rule.

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  15. What is electric motor? Explain its working.

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  16. State the principle on which the working of an electric motor is based...

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  17. Explain the construction and working of an electric motor. Draw a neat...

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  18. Explain with a labelled diagram, the principle, construction and worki...

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  19. State the uses/applications of an electric motor.

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  20. (i) Which principle is explained in this figure? (ii) Which rule ...

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