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Q.

As shown in circuit diagram an ideal voltmeter and an ideal ammeter reading are zero. Sum of potential drop across box and 5 Ω resistances will be (given that there are no fault in voltmeter and ammeter)

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a

Data

b

5 volt

c

12 volt

d

7 volt

answer is C.

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Detailed Solution

Since voltmeter is ideal reading of voltmeter is zero.
So, either fault is in box or 5 Ω resistance.
So, potential difference across box and 5 Ω resistance will be 12 volt

 

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