Question

Four identical resistors are connected in the circuit above. Several points in the circuit have been labeled. Students use a voltmeter and an ammeter to make measurements of the potential differences between two points and the current present at any point, respectively. Which of the following would create the greatest amount of error in a measurement? Connecting the voltmeter between points B and D B ) Inserting the ammeter at point C Connecting the ammeter between points A and D D ) Inserting the ammeter at point A Connecting the voltmeter between points A and B

Answer 1

The greatest amount of error in a measurement would occur if the ammeter is inserted at point A. This is because inserting an ammeter in series with a resistor will change the total resistance of the circuit and affect the current flow throughout the circuit. In contrast, connecting a voltmeter between two points only measures the potential difference between those two points and does not significantly affect the circuit. Therefore, options A and E would not create a significant error, and options B and C would create some error, but not as much as option D.