Potentiometer

Potentiometer

Assessment

Interactive Video

Physics

10th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

The video tutorial explains the use of a potentiometer, a device similar to a meter bridge but with a longer resistance wire for greater accuracy. It describes how a standard cell maintains a constant current, allowing the potentiometer to compare the EMF of two cells using a two-way key and Kirchoff's loop rule. The tutorial also covers measuring the internal resistance of a cell by connecting it across a resistance box. The potentiometer's advantage is that it draws no current from the voltage source, making it unaffected by the source's internal resistance.

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5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary advantage of using a potentiometer over a meter bridge?

It requires less maintenance.

It is cheaper to manufacture.

It allows for greater accuracy due to a longer resistance wire.

It can measure temperature changes.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the potentiometer setup, what role does the standard cell of EMF e1 play?

It acts as a backup power source.

It measures the potential difference.

It maintains a constant current throughout the wire.

It provides a variable current.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the potentiometer compare the EMF of two cells?

By measuring the temperature difference.

By using a two-way key and balancing the EMFs.

By calculating the resistance difference.

By using a digital display.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the resistance box in measuring internal resistance with a potentiometer?

To act as a safety device.

To help determine the internal resistance of the cell.

To adjust the current flow.

To provide a constant voltage.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the potentiometer unaffected by the internal resistance of the source?

Because it is made of a special material.

Because it has a built-in compensator.

Because it draws no current from the voltage source being measured.

Because it uses a digital meter.

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