Statement of Ohm's Law: Ohm's law states that at a constant temperature, current 'I' through a conductor between two points is directly proportional to the potential difference or voltage 'V', across the two points. That is, ... This constant is called as the resistance (R) of the conductor.


OHM'S LAW :
>>"George Simon Ohm"proposed the Ohm's law
>>Ohm's law states that,"Thepotential difference at the ends of the conductor is directly proportinal to amount of current flowing through it,at constant temperature"
>>Simply...It can be defined as,"If the potential difference increases,then the flow of current also increases and vice versa.
>>As we know,Potential Diff.isdenoted by"V"and Current is denoted by "I"
>>Ohm's laws result is..V/Ivalue is constant,at constant Temp.
>>It can be verified..by performing theexperiment.


Material required :
battries of 1.5V, Conducting wires, iron spoke, LED bulb, ammeter, volt meter,

Procedure:
• Arrange the circuit as shown in the attachment.
• Connect the battery..and note the values of I and V in a table.
• Connect 2, 3, 4 and 5 battries and note the values of I and V in each case.
• Observe the temp. of spoke
• Next find the value of V/I in each case
• Now, remove the Iron spoke and connect the LED.
• Do the same..by connecting battries and note the values
• observe the temp. of LED
• Next find the value of V/I in each case.
• Draw the graphs..for the both iron spoke and LED cases and observe
Observation :
It will observed that the, V/I value is constant for IRON SPOKE..but, it isn't for lED
Also, the Temp. of Spoke is constant. But, the temp. of LED is not constant!
The graph of the values of I and V of spoke is linear but, it is not linear for LED.


Result :
The constant value of V/I indicates that,the potential diff.is directly proportinal to Current flowing through it and provided the same temperature.

Ohm's Law

Ohm's Law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance of the conductor. It is named after the German physicist, Georg Simon Ohm, who formulated this law.

Activity to Demonstrate Ohm's Law

To understand Ohm's Law, let's perform a simple activity using a circuit consisting of a power source, a resistor, and an ammeter.

Materials Required:
- Power source (battery or power supply)
- Resistor (a variable resistor is preferable)
- Ammeter
- Connecting wires

Procedure:
1. Set up the circuit by connecting the power source, resistor, and ammeter in series.
2. Ensure that the power source is turned off before making any connections.
3. Connect one end of the resistor to the positive terminal of the power source.
4. Connect the other end of the resistor to one terminal of the ammeter.
5. Connect the remaining terminal of the ammeter to the negative terminal of the power source.
6. Ensure that all connections are secure and there are no loose wires.
7. Turn on the power source.

Observations:
1. As the current flows through the circuit, the ammeter will show a reading.
2. Measure the voltage across the resistor using a voltmeter.

Analysis:
According to Ohm's Law, the current (I) flowing through the circuit is directly proportional to the voltage (V) across the resistor and inversely proportional to the resistance (R) of the resistor. Mathematically, it can be represented as:

I = V/R

Conclusion:
By performing this activity and observing the relationship between current, voltage, and resistance, we can conclude that Ohm's Law holds true. As we increase the voltage or decrease the resistance, the current in the circuit increases. Conversely, decreasing the voltage or increasing the resistance reduces the current.

Applications of Ohm's Law:
Ohm's Law is a fundamental principle in electrical engineering and has several practical applications. Some of them include:

1. Designing and analyzing circuits: Ohm's Law helps engineers and scientists design and analyze electrical circuits by determining the current, voltage, and resistance values.
2. Selecting appropriate components: By understanding Ohm's Law, it becomes easier to select appropriate resistors and other components for a circuit based on the desired current and voltage.
3. Troubleshooting electrical problems: Ohm's Law can be used to diagnose and troubleshoot electrical problems by measuring the current, voltage, and resistance values in a circuit.
4. Power calculations: Ohm's Law is crucial in calculating power dissipation in a circuit, which is essential for designing and sizing components.

Overall, Ohm's Law is a fundamental concept in electricity that helps us understand and analyze the behavior of electrical circuits.