Three different circuits (I, II and III) are constructed using identical batteries and resistors of R and 2R ohm.

What can be said about current I in arm AB of each circuit?

$I_{I I} < I_{I} < I_{I I I}$

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$I_{I} < I_{I I} < I_{I I I}$

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$I_{I} = I_{I I} = I_{I I I}$

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$I_{I} > I_{I I} = I_{I I I}$

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Solution

The correct option is C
$I_{I} = I_{I I} = I_{I I I}$

Currents in arm AB in all the circuits are same and is equal to E/R.

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Question 12
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

(i) $A u$
(ii) $C u$
(iii) $N a$
(iv) $K$

(a) (i) and (ii) (b) (i) and (iii)

Question 12
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

(i) $A u$
(ii) $C u$
(iii) $N a$
(iv) $K$

(a) (i) and (ii) (b) (i) and (iii)

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