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Two exactly similar heating resistances ...

Two exactly similar heating resistances are connected (i) in series, and (ii) in parallel, in two different circuits, one by one. If the same current is passed through both the combinations, is more heat obtained per minute when they are connected in series or when they are connected in parallel? Give reason for you answer.

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The correct Answer is:
In series
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. The electrical resistivities of four materials P,Q,R and S are given b...

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

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

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

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  5. What does an electric circuit mean ?

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  6. Define the unit of current.

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. What is : (a) the highest (b) the lowest total resistances that can b...

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