*Question G6A02:
What is an advantage of batteries with low internal resistance?*  

*Correct Answer is  B: High discharge current*  

### AI Response: (may contain errors)  

Batteries with low internal resistance have several characteristics that affect their performance. Let's explore why the correct answer is "High discharge current" and why the other options are incorrect.

### Correct Answer: High discharge current

1. **Why it's correct:**
   - **High Discharge Current:** Batteries with low internal resistance can deliver a higher current to a load. This is because the internal resistance limits the current flow; lower resistance means less voltage drop inside the battery, allowing more current to be delivered to the external circuit.

   - **Ohm's Law Application:** The voltage drop across the internal resistance ($V_{\text{drop}}$) can be calculated using Ohm's Law:  
     $$V_{\text{drop}} = I \times R_{\text{internal}}$$  
     where $I$ is the current and $R_{\text{internal}}$ is the internal resistance. Lower $R_{\text{internal}}$ results in a smaller $V_{\text{drop}}$, allowing more voltage to be available for the load, thus supporting higher current.

### Why the other choices are incorrect:

2. **Long life (A):**
   - **Incorrect:** While low internal resistance can improve efficiency, it does not directly correlate with the battery's lifespan. Battery life is more influenced by factors like charge cycles, temperature, and chemical stability.

3. **High voltage (C):**
   - **Incorrect:** The voltage of a battery is determined by its chemistry and design, not its internal resistance. Low internal resistance affects current delivery, not the inherent voltage of the battery.

4. **Rapid recharge (D):**
   - **Incorrect:** Although low internal resistance can help with efficient energy transfer, rapid recharge is more dependent on the battery's chemistry and the charging system's design. Low internal resistance alone does not ensure rapid recharge capability.

In summary, low internal resistance primarily enhances a battery's ability to deliver high discharge currents, making it the correct answer for this question.