First slide

combination of resistance

Question

Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is

Easy

A

6 ohm
B

9 ohm
C

12 ohm
D

15 ohm

Solution

Since the given bridge is balanced, hence there will be no current through $9 Ω$ resistance. This resistance has no effect and must be ignored in the calculations.
$R_{AB} = \frac{9 \times 18}{27} = 6 Ω$

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