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  4. For what value of R in the circuit as shown current passing through 4 Ω resistance will be zero <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-i2jpaoyuxtxrynka.jpg />

Q. For what value of in the circuit as shown current passing through resistance will be zero

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Solution:

When the current through resistance is zero, then

i.e., the potential difference across resistance would be
Current through resistance is .
The potential difference across R is and flows through it

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