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On interchanging the resistance , th...

On interchanging the resistance , the balance point of a metre bridge shifts to the left by 10 cm . The resistance of their series combination is `1 K Omega ` . How much was the resistance on the slot before intercharging the resistances ?

A

`550 Omega`

B

`910 Omega `

C

`990 Omega `

D

`505 Omega `

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