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Questions and Answers
What is the primary function of a potentiometer?
What is the primary function of a potentiometer?
- To impose current from an outer source to the cell
- To cause chemical change in the cell
- To measure electromotive force without withdrawing any current from the cell (correct)
- To measure electromotive force by withdrawing current from the cell
What is the condition required to measure the equilibrium potential of a system using a potentiometer?
What is the condition required to measure the equilibrium potential of a system using a potentiometer?
- At minimum voltage
- At maximum current
- At maximum voltage
- At zero current (correct)
What is the purpose of the slid wire in a potentiometer?
What is the purpose of the slid wire in a potentiometer?
- To vary the voltage of the cell
- To vary the fraction of the known source voltage applied to the cell (correct)
- To measure the current flowing through the galvanometer
- To connect the galvanometer to the cell
What is the function of a salt bridge in a potentiometer?
What is the function of a salt bridge in a potentiometer?
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What is the purpose of blocking the ends of the salt bridge with cotton wool or gelatin?
What is the purpose of blocking the ends of the salt bridge with cotton wool or gelatin?
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What is the term for the potential developed between the two boundaries of the junction at the two ends of the salt bridge?
What is the term for the potential developed between the two boundaries of the junction at the two ends of the salt bridge?
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What is the purpose of the galvanometer in a potentiometer?
What is the purpose of the galvanometer in a potentiometer?
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What is the condition required for the potentiometer to measure the voltage of the cell?
What is the condition required for the potentiometer to measure the voltage of the cell?
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What is the purpose of the known voltage source in a potentiometer?
What is the purpose of the known voltage source in a potentiometer?
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What is the shape of the salt bridge in a potentiometer?
What is the shape of the salt bridge in a potentiometer?
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