निम्नलिखित नेटवर्क में R1 का मान क्या है?

sachin ji

  1. 25 Ω 
  2. 50 Ω 
  3. 100 Ω 
  4. 2000 Ω 

Answer (Detailed Solution Below)

Option 3 : 100 Ω 
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Detailed Solution

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वोल्टेज विभाजन सिद्धांत से, VR2=V.R2R1+R2

20=70R2R1+R2

20R1=50R2

2R1=5R2..(1)

और I=(10070)60=0.5

and I(R1+R2)=70

i.e.R1+R2=140..(2)

(1) और (2) से,

R1+25R1=140R1=100 Ω,R2=40 Ω

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