Ohm's Law: Resistance and Heating Effects Result Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage appli...
Ohm's Law: Resistance and Heating Effects Result
Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across the conductor and inversely proportional to the resistance of the conductor.
Expression:
I = V/R
where:
I is the current in amperes
V is the voltage in volts
R is the resistance in ohms
Explanation:
Resistance measures the opposition to the flow of electric current in a conductor. It is measured in ohms (Ω).
Voltage is the amount of electric charge transferred per unit of time. It is measured in volts (V).
Current is the rate at which electric charge flows through a conductor. It is measured in amperes (A).
According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage applied across the conductor. This means that if the voltage is increased, the current will also increase, and if the voltage is decreased, the current will also decrease.
Additionally, according to Ohm's Law, the current flowing through a conductor is inversely proportional to the resistance of the conductor. This means that if the resistance is increased, the current will decrease, and if the resistance is decreased, the current will increase.
Examples:
A light bulb with a resistance of 12 Ω has a voltage of 12 V when connected to a 12 V battery.
A 100 Ω resistor connected to a 220 V source will have a current of 0.44 A.
A circuit with a 10 Ω resistor and a 12 V battery will have a current of 1 A.
These examples illustrate how the resistance of a conductor determines the amount of current that flows through it. When the resistance is high, the current is low, and when the resistance is low, the current is high