ICSE Class 10 Physics Notes
Electricity and Magnetism
1. Electric Current
Electric current is the rate of flow of electric charge through a conductor.
Unit: Ampere (A)
2. Potential Difference
It is the work done in moving a unit positive charge from one point to another.
Unit: Volt (V)
3. Ohm's Law
At constant temperature, the current flowing through a conductor is directly proportional to the potential
difference across its ends.
Formula: V = IR
4. Resistance
Resistance is the opposition offered by a conductor to the flow of current.
Unit: Ohm (Ω)
Factors Affecting Resistance
• Length of conductor
• Area of cross-section
• Nature of material
• Temperature
Electricity and Magnetism
1. Electric Current
Electric current is the rate of flow of electric charge through a conductor.
Unit: Ampere (A)
2. Potential Difference
It is the work done in moving a unit positive charge from one point to another.
Unit: Volt (V)
3. Ohm's Law
At constant temperature, the current flowing through a conductor is directly proportional to the potential
difference across its ends.
Formula: V = IR
4. Resistance
Resistance is the opposition offered by a conductor to the flow of current.
Unit: Ohm (Ω)
Factors Affecting Resistance
• Length of conductor
• Area of cross-section
• Nature of material
• Temperature
