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(a) Explain with the help of a labelled ...

(a) Explain with the help of a labelled circuit diagram, how you will find the resistance of a combination of three resistors of resistances `R_(1),R_(2)` and `R_(3)` joined in parallel.
(b) In the diagram shown below, the cell and the ammeter both have negligible resistance. The resistors are identical.

With the switch K open, the ammeter reads 0.6A. What will be the ammeter reading when the switch is closed?

Text Solution

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The correct Answer is:
(b) `0.9A`
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. (a) With the help of a diagram, derive the formula for the resultant r...

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  2. (a) With the help of a circuit diagram, obtain the relation for the eq...

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  3. (a) Explain with the help of a labelled circuit diagram, how you will ...

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  4. The figure given below shows three resistors: Their combined resi...

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  5. If two resistors of 25 Omega and 15 Omega are joined together in serie...

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  6. The diagram below shows part of a circuit: If this arrangement of...

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  7. In the circuit shown below: The potential difference across the 3...

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  8. A battery and three lamps are connected as shown: Which of the fo...

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  9. V(1),V(2) and V(3) are the p.ds. across the 1Omega, 2Omega and 3Omega ...

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  10. A wire of resistance R(1) is cur into five equal pieces. These five pi...

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  11. Show with the help of diagrams, how you would connet three resistors e...

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  12. Two resistances when connected in parallel give resultant value of 2 o...

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  13. A resistor of 8 ohms is connected in parallel with another resistor X....

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  14. You are given three resistances of 1,2 and 3 ohms. Show by diagrams, h...

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  15. How will you connect three resistors of 2Omega, 3Omega and 5Omega resp...

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  16. How will you connect three resistors of 2Omega, 3Omega and 6Omega to o...

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

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  18. What is the resistance between A and B in the figure given below?

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  19. You are given one hundred 1Omega resistors. What is the smallest and l...

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  20. You are supplied with a number of 100Omega resistors. How could you co...

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