If a potentiometer is used to measure the EMF of a cell and the balance point is found at 3 m, what can be inferred about the cell's EMF if the potential gradient is 1.5 V/m?
Practice Questions
1 question
Q1
If a potentiometer is used to measure the EMF of a cell and the balance point is found at 3 m, what can be inferred about the cell's EMF if the potential gradient is 1.5 V/m?
1.5 V
3 V
4.5 V
6 V
The EMF of the cell can be calculated as EMF = potential gradient × length = 1.5 V/m × 3 m = 4.5 V.
Questions & Step-by-step Solutions
1 item
Q
Q: If a potentiometer is used to measure the EMF of a cell and the balance point is found at 3 m, what can be inferred about the cell's EMF if the potential gradient is 1.5 V/m?
Solution: The EMF of the cell can be calculated as EMF = potential gradient × length = 1.5 V/m × 3 m = 4.5 V.
Steps: 5
Step 1: Understand that the EMF (Electromotive Force) of a cell can be calculated using the formula: EMF = potential gradient × length.
Step 2: Identify the values given in the question. The potential gradient is 1.5 V/m and the length at which the balance point is found is 3 m.
Step 3: Substitute the values into the formula. EMF = 1.5 V/m × 3 m.
Step 4: Perform the multiplication. 1.5 multiplied by 3 equals 4.5.
Step 5: Conclude that the EMF of the cell is 4.5 V.
