Calculate the voltage across terminals:
A voltmeter in the 100 volt range along with a sensitivity of 40 K?/V is to measure the voltage across terminals ab.
Find:
1. Vo
2. Vw
3. Kv
![1376_Calculate the voltage across terminals.png](https://www.expertsmind.com/CMSImages/1376_Calculate%20the%20voltage%20across%20terminals.png)
Figure: Measuring Circuit Voltage
Solution:
1. Vo = 100K?/100K? +100K? x 220V
Vo = 110 volts
2. Ro = (100)(100)/ 100+100 =50K? Rin =SV =(40K?/V)(100V)- 4.4M?
Vw = (Rin / Ro +Rin)Vo
= (4.4 x 106/50 x 103 + 4.4 x 106) (110)
=(0.99)(110)
Vw = 108.9 volts
3. Kv =Vw/Vo
=108.9/110
Kv = 0.99 or 99%