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How Will You Connect Three Resistors of Resistances 2 ω, 3 ω, and 6 ω to Obtain a Total Resistance of 4 ω, and 1 ω?

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प्रश्न

How will you connect three resistors of resistances 2 Ω, 3 Ω, and 6 Ω to obtain a total resistance of  4 Ω, and  1 Ω?

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उत्तर

To obtain a 4 Ω resistance, connect the 2 Ω resistor in series with the parallel combination of the resistors of values 6 Ω and 3 Ω.
To obtain a 1 Ω resistance, connect all the resistors in parallel. 

 

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अध्याय 4: Electricity - Exercise 5

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लखमीर सिंग Physics [English] Class 10
अध्याय 4 Electricity
Exercise 5 | Q 48

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संबंधित प्रश्न

Show how you would connect two 4 ohm resistors to produce a combined resistance of (a) 2 ohms (b) 8 ohms.


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A 4 Ω coil and a 2 Ω coil are connected in parallel. What is their combined resistance? A total current of 3 A passes through the coils. What current passes through the 2 Ω coil? 


Two resistances when connected in parallel give resultant value of 2 ohm; when connected in series the value becomes 9 ohm. Calculate the value of each resistance.


A resistor of 8 ohms is connected in parallel with another resistor X. The resultant resistance of the combination is 4.8 ohms. What is the value of the resistor X?


You are given three resistances of 1, 2 and 3 ohms. Shows by diagrams, how with the help of these resistances you can get:

(i) 6 Ω
(ii) `6/1` Ω
(iii) 1.5 Ω


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  1. between the points P and Q.
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A particular resistance wire has a resistance of 3 ohm per meter. Find the total resistance of three lengths of this wire each 1.5 m long, joined in parallel.


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Show how would you connect three resistors, each of resistance 6 O so that
the combination has a resistance of(a) 9 Ω (b) 4 .Ω


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Draw a labeled diagram of the arrangement


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What connection is used in domestic appliances and why?


A piece of wire having a resistance R is cut into five equal parts.

  1. How will the resistance of each part of the wire change compared with the original resistance?
  2. If the five parts of the wire are placed in parallel, how will the resistance of the combination change?
  3. What will be ratio of the effective resistance in series connection to that of the parallel connection?

You are given four ammeters A, B, C and D having the least counts mentioned below:

(I) Ammeter A with least count 0.25 A

(II) Ammeter B with least count 0.5 A

(III) Ammeter C with least count 0.05 A

(IV) Ammeter D with least count 0.1 A

Which of the ammeters would you prefer for doing an experiment to determine the equivalent resistance of two resistances most accurately, when connected in parallel?


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