Refer .for what value of R (in ohm) wil...

Refer .for what value of `R` (in ohm) will the current in galvanmeter `G` be zero

Text Solution

Verified by Experts

The correct Answer is:

When the currect through galvanometer is zero,
then pot diff across `R Omega = 7 V`
pot diff across `5 Omega= 12 - 7= 5 V`
current in `5 Omega` = (5)/(5) = 1A`
Resistance, `R = (7)/(1)= 7 Omega `

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For what value of R , the current in galvanometer is zero ?

`5Omega`

`2Omega`

`7Omega`

`1Omega`

For what value of R , current in the galvanometer is zero ?

`1 Omega`

`2 Omega`

`5 Omega`

`7 Omega`

The current in the resistance R will be zero if

`E_(1)r_(1)=E_(2)r_(2)`

`(E_(1))/(r_(1))=(E_(2))/(r_(2))`

`(E_(1)+E_(2))r_(1)=E_(1)r_(1)`

`(E_(1)-E_(2))r_(1)=E_(2)r_(1)`