1.

In the given circuit in which case will the ammeter reading not change when `R_2` is varied? A. `R_1= r`B. `R_1 = 2r`C. `R_1gtR_2`D. `r =0`

Answer» Correct Answer - D
d. When r = 0 the terminal potential difference in the arm
containing `R_1` remains unchanged, so the ammeter reading does
not change.


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