When using a potentiometer to measure the emf of a cell, what condition must be satisfied?
Practice Questions
1 question
Q1
When using a potentiometer to measure the emf of a cell, what condition must be satisfied?
The circuit must be closed
The circuit must be open
The cell must be short-circuited
The cell must be connected in series
The circuit must be open when measuring the emf of a cell with a potentiometer to ensure that no current flows through the cell, allowing for an accurate measurement.
Questions & Step-by-step Solutions
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Q
Q: When using a potentiometer to measure the emf of a cell, what condition must be satisfied?
Solution: The circuit must be open when measuring the emf of a cell with a potentiometer to ensure that no current flows through the cell, allowing for an accurate measurement.
Steps: 5
Step 1: Understand what a potentiometer is. It is a device used to measure the electromotive force (emf) of a cell.
Step 2: Know that emf is the voltage provided by a cell when no current is flowing.
Step 3: Realize that to measure the emf accurately, you need to prevent any current from flowing through the cell.
Step 4: Ensure that the circuit is open, meaning there should be no complete path for current to flow.
Step 5: With the circuit open, connect the potentiometer to the cell to measure the emf.
