Find current 'i' in the given circuit. 

F2 Vinanti Engineering 15.12.22 D4

This question was previously asked in
HPCL Engineer Electrical 01 Nov 2022 Official Paper
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  1. 0.015 A
  2. 0.15 A
  3. 1.5 A
  4. 15 A

Answer (Detailed Solution Below)

Option 1 : 0.015 A
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Detailed Solution

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The correct answer is option 1):(0.015 A)

Concept:

when three resistors R1,R2,R3 are connected in series  Req =  R1R2 +R3 Ω 

According to ohms law 

V = IR

Where

V is the voltage

I is the current 

R is the resistance

Calculation:

The given circuit is 

F2 Vinanti Engineering 15.12.22 D4

 Req  = 100 +400 +300

= 800 Ω 

I = \(V\over R\) = \(12 \over 800\)

= 0.015 A

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