In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6\(\Omega\) is connected to the other end of the wire. Determine the value of the unknown resistance
a
3.2\(\Omega\)
b
1.4\(\Omega\)
c
3.21\(\Omega\)
d
1.2\(\Omega\)
Explanation
Correct Option
dVideo Explanation
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DominicAfam
1 year ago
R1=3.6ohm
R2=? 😭
L2=25cm
L1=(100-25) =75cm
R1/R2=L1/L2
3.6/R2=75/25
3.6/R2=3/1
Cross multiply
3R2=3.6
Divide both side by 3
R2=3.6/3
R2=1.2ohm 😂
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