Potentiometer is preferred for the measurement of emf of a cell rather than voltmeter. Why?

Ashish    June 17 2025 03:27:38 PM

A potentiometer is preferred over a voltmeter to measure the emf of a cell because it doesn’t draw any current from the cell while measuring.

This means it measures the true emf without affecting the cell’s voltage.

On the other hand, a voltmeter draws some current, which can cause the reading to be less accurate.

So, the potentiometer gives a more precise measurement of the emf.

SNEHA SATGHARE    June 17 2025 03:28:20 PM

A potentiometer is better for measuring emf because it doesn’t take any current from the cell, so it doesn’t change the emf while measuring.

But a voltmeter lets some current flow, which can lower the reading and make it less accurate.

That’s why we use a potentiometer to get the real emf value.

Prajwal MR    June 17 2025 03:29:36 PM

A potentiometer is preferred because it measures the emf without actually using up any energy from the cell, so the reading shows the true emf.

A voltmeter, however, draws some current and can make the emf look smaller than it really is.

That’s why the potentiometer gives a more accurate result.

Aswini R    June 17 2025 03:31:22 PM

We use a potentiometer instead of a voltmeter because the potentiometer doesn’t take any current from the cell, so it doesn’t change the cell’s voltage.

A voltmeter, on the other hand, draws a little current, which can affect the reading and make it less exact.

So, the potentiometer gives a more accurate measurement of the emf.

Dunno    June 24 2025 01:02:17 PM

A potentiometer is preferred over a voltmeter for measuring the emf of a cell because it measures the emf without drawing any current from the cell.

When a voltmeter is connected, it allows current to flow, which can cause a drop in the cell’s terminal voltage and lead to an inaccurate reading.

The potentiometer, on the other hand, balances the emf against a known voltage without taking current, giving a more precise and true measurement of the cell’s emf.

Puruda    June 24 2025 01:03:32 PM

A potentiometer is used instead of a voltmeter to measure the emf of a cell because it doesn’t draw any current from the cell while measuring.

This means the cell’s true emf can be measured accurately.

A voltmeter, however, draws some current when connected, which can cause the voltage to drop and give a lower, less accurate reading.

So, the potentiometer gives a more precise measurement of the cell’s emf.