Even if Eq. (6 – 1) is not satisfied, the impedances(阻抗) obtained on the assumption that it is are accurate within a few percent.
举一反三
- In which of the following situations would you prefer to be making a loan? A: The interest rate is 9 percent and the expected inflation rate is 7 percent. B: The interest rate is 4 percent and the expected inflation rate is 1 percent. C: The interest rate is 13 percent and the expected inflation rate is 15 percent. D: The interest rate is 25 percent and the expected inflation rate is 50 percent.
- If the value of a piece of property decreases by 10 percent while the tax rate on the property increases by 10 percent, what is the effect on the taxes ？（） A: Taxes increase by 10 percent. B: Taxes increase by 1 percent. C: There is no change in taxes. D: Taxes decrease by 1 percent. E: Taxes decrease by 10 percent.
- If the dollar interest rate is 10 percent, the euro interest rate is 6 percent, then an investor should be indifferent between dollars and euros if the expected dollar depreciation against the euro is 4 percent.
- According to a study finished in 2011, what percent of the groundwater in cities was polluted? A: Over 90 percent. B: 20 percent. C: 64 percent.
- The Rule of 72 is fairly accurate for discount rates in the 5 percent to 20 percent range.