If the value of resistance is 10.845 ohms and the value of current is 3.23 amperes, the potential difference is 35.02935 volts. Its value in significant number would be
Correct Answer :
35.0 V
Solution :
The correct answer is 35.0 V.
Step-by-step Explanation:
1. Identify the given values and their significant figures:
- The value of resistance () is 10.845 Ω, which has 5 significant figures.
- The value of current () is 3.23 A, which has 3 significant figures.
2. Determine the potential difference:
According to Ohm's law, the potential difference () is calculated as:
Using the raw values:
3. Apply the rules of significant figures for multiplication:
When multiplying or dividing numbers, the final result must be rounded to the same number of significant figures as the measurement with the fewest significant figures.
- Resistance has 5 significant figures.
- Current has 3 significant figures.
Therefore, the final potential difference must be rounded to 3 significant figures.
4. Rounding the result:
Rounding 35.02935 V to 3 significant figures gives 35.0 V (since the digit after the first decimal place is 2, we round down).
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