Class-7 Science – 10 Electric Current and its Effects

 

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In symbol of electric cell

#1. Longer line represents

#2. thicker shorter line represents

#3. Symbol of wires is

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#4. combination of two or more cells is called a ……..

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#5. Current flows when

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#6. coil of wire of electric iron is called an …..

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#7. ……. marks assurance of conformity to the specifications given on the products.

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#8. Fluorescent tubes and CFLs contain …….. vapour.

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#9. Electric fuses are made of ….. material

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#10. These days …… are used in place of fuses.

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#11. When electric current passes through a wire, it behaves like a magnet

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#12. A current carrying coil of an insulated wire wrapped around a piece of iron is called an ……..

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#13. The safety device based on the heating effect of electric current is called a …..

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#14. The effect of electric current that produces heat is known as:

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#15. The heating effect of electric current is used in:

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#16. What does a battery provide in a circuit?

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#17. What happens when a current flows through a conductor?

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#18. The magnetic effect of electric current is used in:

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#19. What is the function of a fuse in an electric circuit?

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#20. A material that allows the current to pass through it easily is called:

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#21. Which of the following is the main function of a cell in an electric circuit?

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#22. What happens when an electric current passes through a wire?

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#23. The direction of electric current is taken as:

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#24. The electric motor works on the principle of:

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