In the current shown Fig., `X` is joined to `Y` for a long time and then `X` is joined to `Z`. The total heat produced in `R_(2)` is A. `(L varepsilon^(2))/(2R_(1)^(2))`B. `(Lvarepsilon^(2))/(2R_(2)^(2))`C. `(Lvarepsilon^(2))/(2R_(1)R_(2))`D. `(Lvarepsilon^(2)R_(2))/(2R_(1)^(3))`

In the current shown Fig., `X` is joined to `Y` for a long time and th

1.	In the current shown Fig., `X` is joined to `Y` for a long time and then `X` is joined to `Z`. The total heat produced in `R_(2)` is A. `(L varepsilon^(2))/(2R_(1)^(2))`B. `(Lvarepsilon^(2))/(2R_(2)^(2))`C. `(Lvarepsilon^(2))/(2R_(1)R_(2))`D. `(Lvarepsilon^(2)R_(2))/(2R_(1)^(3))`
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In the current shown Fig., `X` is joined to `Y` for a long time and then `X` is joined to `Z`. The total heat produced in `R_(2)` is A. `(L varepsilon^(2))/(2R_(1)^(2))`B. `(Lvarepsilon^(2))/(2R_(2)^(2))`C. `(Lvarepsilon^(2))/(2R_(1)R_(2))`D. `(Lvarepsilon^(2)R_(2))/(2R_(1)^(3))`

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