Figure Q3(b) shows the connection of a voltmeter to measure the potential difference across resistor R2. Given that the sensitivity of the voltmeter is 25 kΩ/V.
R1 = 25 kΩ
V = 25 V
R2 = 5 kΩ
Figure Q3(b)
i. Determine the voltage reading and the percentage of error for each reading if the range of the voltmeter is 5 V and 10 V. [5 marks]
ii. What can you conclude based on the calculations above? [2 marks]
iii. Calculate the new value of the sensitivity for a voltmeter with a 10 V range, assuming that the voltmeter should give 95% measurement accuracy. [3 marks]