Loading effect MCQ Questions
In above figure if the internal resistance of voltmeter is 5M ohm the voltmeter will display:
- 1.2 V
- 2.4 V
- 4 V
- 8 V
Correct answer: 2. 2.4 V
Solution: 5 Mohm internal resistance will reduce the overall resistance to 2.5 M ohm. Now from voltage divider rule:
V = {2.5/(2.5 + 10)} * 12 V = 2.4 V
