On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of their series combination is 1 kΩ. How much was the resistance on the left slot before interchanging the resistances ?
910 Ω
990 Ω
505 Ω
550 Ω
As we learnt that
Meter bridge -
To find the resistance of a given wire using a meter bridge and hence determine the specific resistance of its materials
- wherein
Lets say resistances are R and 1000-R
Case I : eq 1
Case II: eq 2
Multiply both equation
or
or
or
Option 1)
910 Ω
This is incorrect
Option 2)
990 Ω
This is incorrect
Option 3)
505 Ω
This is incorrect
Option 4)
550 Ω
This is correct
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