If the balance length of a potentiometer is 50cm for a cell of unknown emf, and

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Question: If the balance length of a potentiometer is 50cm for a cell of unknown emf, and the potential gradient is 4 V/m, what is the emf of the cell?

Options:

Correct Answer: 4V

Solution:

The emf is calculated as V = potential gradient × length = 4 V/m × 0.5 m = 2 V.

If the balance length of a potentiometer is 50cm for a cell of unknown emf, and

Practice Questions

If the balance length of a potentiometer is 50cm for a cell of unknown emf, and the potential gradient is 4 V/m, what is the emf of the cell?

Questions & Step-by-Step Solutions

If the balance length of a potentiometer is 50cm for a cell of unknown emf, and the potential gradient is 4 V/m, what is the emf of the cell?

Step 1: Understand that the potentiometer measures the electromotive force (emf) of a cell.
Step 2: Identify the given values: the balance length is 50 cm and the potential gradient is 4 V/m.
Step 3: Convert the balance length from centimeters to meters: 50 cm = 0.5 m.
Step 4: Use the formula for emf: emf = potential gradient × length.
Step 5: Substitute the values into the formula: emf = 4 V/m × 0.5 m.
Step 6: Calculate the result: emf = 2 V.

Potentiometer Basics – Understanding how a potentiometer measures emf using the potential gradient and balance length.
Potential Gradient – The rate of change of potential per unit length, crucial for calculating emf in this context.
Unit Conversion – Converting cm to meters to ensure consistency in units when performing calculations.

If the balance length of a potentiometer is 50cm for a cell of unknown emf, and

What’s inside this PDF?

If the balance length of a potentiometer is 50cm for a cell of unknown emf, and

Practice Questions

Questions & Step-by-Step Solutions

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