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Ohm's Law in Scalar Form

In the circui...

Question

In the circuit shown below what should be the emf $E_{2}$ such that no current flows through the resistor $^{'} r_{3}^{'}$

A

8 V

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B

12 V

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C

- 6 V

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D

21 V

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Solution

The correct options are
A $8 V$
C $- 6 V$

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