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(a) How does the wire in the filament of...

(a) How does the wire in the filament of a light bulb behave differently to the other wires in the circuit when the current flows?
(b) What property of the filament wire accounts for this difference?

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The correct Answer is:
(a) The filament wire becomes white hot whereas other wires in the circuit do not get heated much (b) High resistance of filament wire
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. If the current flowing through a fixed resistor is halved, the heat pr...

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  2. The electrical resistivities of four materials P,Q,R and S are given b...

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  3. (a) How does the wire in the filament of a light bulb behave different...

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  4. Two exactly similar heating resistances are connected (i) in series, a...

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  5. Which electric heating devices in your home do you think have resistor...

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  6. What does an electric circuit mean ?

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  7. Define the unit of current.

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  8. Calculate the number of electrons consituting one coulomb of charge.

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  9. Name a device that helps to maintain a potential difference across a c...

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  10. What is meant by saying that the potential difference between two poin...

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  11. How much energy is given to each coulomb of charge passing through a 6...

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  12. On what factors does the resistance of a conductor depend ?

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  13. Will current flow more easily through a thick wire or a thin wire of t...

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  14. Let the resistance of an electrical component remain constant while th...

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  15. Why are coils of electric toasters and electric irons made of an alloy...

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  16. Draw a schematic diagram of a circuit consisting of a battery of three...

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  17. Judge the equivalent resistance when the following are connected in pa...

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  18. An electric lamp of 100 Omega, a toaster of resistance 50 Omega and a ...

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  19. What are the advantages of connecting electrical devices in parallel w...

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  20. How can three resistors of resistances 2 Omega,3 Omega, and 6 Omega be...

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