Under what condition will the current in a wire be the same when connected in series and in parallel on n identical cells each having internal resistance r and external resistance R?

Explanation

To determine the condition under which the current in a wire will be the same when connected in series and in parallel with n identical cells, each having an internal resistance \( r \) and external resistance \( R \), we can follow these steps:

### Step 1: Understand the Circuit Configurations
1. **Series Configuration**: When n identical cells are connected in series, the total EMF \( E_s \) is given by:
\[ E_s = nE \]
The total internal resistance \( r_s \) is:
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