Graphical Representation Volt and Amperes
Experiment to Verify Ohm's Law
We take a conductor (Example Nichrome Wire)
We connect it to a circuit containing Voltmeter and Ammeter
When we supply current, we measure reading of Potential Difference with the help of Voltmeter and Electric Current with help of Ammeter
We calculate Ratio of Potential Difference/Electric Current
Now,we increase amount of current,
We again measure reading of Potential Difference and Electric Current and again Calculate Ratio
We note that Ratio Remains the Same
Hence Ohm's Law, which states that Ratio of Potential Difference and Electric Current Remains the same, is verified
Q1. The values of Current (I) flowing through a conductor for the corresponding values of potential difference (V) are given. Plot a graph between V and I.
| V (Volt) | 2.5 | 5 | 10 | 15 | 25 |
| I (Ampere) | 0.1 | 0.2 | 0.4 | 0.6 | 1 |
From the above table
We can see that,
the ratio of ๐/๐ผ is always constant.
This gives resistance
The resistance is 25 in above case
Q2. The values of Current (I) flowing through a conductor for the corresponding values of potential difference (V) are given. Plot a graph between V and I.
| I (Ampere) | 0.5 | 1 | 2 | 2.5 | 3 |
| V (Volt) | 2 | 4 | 8 | 10 | 12 |
From the above table
We can see that,
the ratio of V/I is always constant.
This gives resistance
The resistance is 4 in above case
Q3. The values of Current (I) flowing through a conductor for the corresponding values of potential difference (V) are given. Plot a graph between V and I.
Hence. find the resistance.
| I (Ampere) | 0.5 | 1 | 2 | 3 | 4 |
| V (Volt) | 1.6 | 3.3 | 6.7 | 10.2 | 13.2 |