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Calculate the value of the current drawn...

Calculate the value of the current drawn from a 5V battery in the circuit as shown

Text Solution

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In case of balanced Wheatstone bridge, no current flows through the resistor `R_(s_1)=10+20=30Omega` between points B and C. The resistance of arm ACD, `R_(s_2)=5+10=15Omega` , The resistance of arm ABD,
Equivalent resistance `R_(eq)=(R_(s_1) times R_(s_2))/(R_(s_1) +R_(s_2))=(30 times 15)/(30+15)=10 Omega`
Current drawn from the source, `I=V/R_(eq)=5/10=1/2A=0.5A`
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