*Question T5D08:
What is the current through a 100-ohm resistor connected across 200 volts?*  

*Correct Answer is  C: 2 amperes*  

### AI Response: (may contain errors)  

To find the current through a resistor, we can use Ohm's Law, which states:

$$I = \frac{V}{R}$$

where:
- $I$ = current in amperes
- $V$ = voltage in volts
- $R$ = resistance in ohms

In this case:
- $V = 200$ volts
- $R = 100$ ohms

Now, substituting the values into the formula:

$$I = \frac{200 \text{ volts}}{100 \text{ ohms}} = 2 \text{ amperes}$$

### Explanation of the Correct Answer:
- The correct answer is **2 amperes** because we applied Ohm's Law correctly, resulting in a current of 2 A through the 100-ohm resistor when 200 volts is applied.

### Explanation of Incorrect Choices:
- **A: 20,000 amperes**  
  This value is incorrect because it suggests an extremely high current that would not occur with the given voltage and resistance. It likely results from a miscalculation or misunderstanding of Ohm's Law.

- **B: 0.5 amperes**  
  This value is too low. If we calculate it using the formula, it would imply a much higher resistance than 100 ohms or a much lower voltage than 200 volts.

- **D: 100 amperes**  
  This value is also incorrect. It would imply a resistance of only 2 ohms if we used the same voltage, which is not the case here.

### Summary:
- Use Ohm's Law to find current: $I = \frac{V}{R}$.
- For this problem, with $V = 200$ volts and $R = 100$ ohms, the current is $2$ amperes.