If the emf of a cell is 12 V and the potentiometer wire is 20 m long, what is the potential gradient if the wire is calibrated to give a reading of 0.6 V/m?
Practice Questions
1 question
Q1
If the emf of a cell is 12 V and the potentiometer wire is 20 m long, what is the potential gradient if the wire is calibrated to give a reading of 0.6 V/m?
12 V
0.6 V/m
0.3 V/m
0.5 V/m
The potential gradient is given as 0.6 V/m, which is the calibration value for the potentiometer.
Questions & Step-by-step Solutions
1 item
Q
Q: If the emf of a cell is 12 V and the potentiometer wire is 20 m long, what is the potential gradient if the wire is calibrated to give a reading of 0.6 V/m?
Solution: The potential gradient is given as 0.6 V/m, which is the calibration value for the potentiometer.
Steps: 5
Step 1: Understand what emf means. Emf stands for electromotive force, which is the voltage provided by a cell.
Step 2: Note the given values. The emf of the cell is 12 V and the length of the potentiometer wire is 20 m.
Step 3: Recognize that the potential gradient is a measure of how much voltage is present per unit length of the wire.
Step 4: Look at the calibration value provided for the potentiometer, which is 0.6 V/m.
Step 5: Conclude that the potential gradient is equal to the calibration value of the potentiometer, which is 0.6 V/m.
