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Why is resistance less in parallel combi...

Why is resistance less in parallel combination of resistors ?

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In parallel combination of resistors, the effective cross-sectional area of the resulting combination decreases and as such resistance decreases as `R prop 1//A`.
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PRADEEP-ELECTRICITY-(Additional)Very Short Answer
  1. Graphs between electric current and potential difference across two co...

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  2. Why is resistance more in series combination of resistors ?

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  3. Why is resistance less in parallel combination of resistors ?

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  4. How will you join three resistances, each of 2 Omega so that the effec...

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  5. On what factors does the resistivity of a material depend ?

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  6. What happens to the current in a circuit if its resistance is doubled ...

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  7. What happens to the resistance of a circuit if the current through it ...

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  8. What happens it the pd across a resistance is doubled ?

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  9. How does the resistance of a wire depend upon its radius ?

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  10. How does the resistance of a wire depend on its length ?

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  11. How does the resistance of a metallic wire depend on its temperature ?

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  12. Two wires are of the same length, same radius, but one of them is of t...

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  13. Find the potential difference required to pass a current of 0.2 A in a...

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  14. An electric bulbs draws 1.2 A current at 6.0 V. Find the resistance of...

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  15. Which will have a higher resistivity : a conductor or an insulator ?

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  16. Two wires of same material and same length have radii r1 and r2 respec...

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  17. Name a substance whose resistance decrease with temperature.

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  18. Name a substance whose resistance almost remains unchanged by increase...

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  19. Distinguish between kilowatt and kilowatt hour.

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  20. Name two special characteristics of a heater coil.

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