Home SSC CGL Syllabus General Awareness Physics Light Optics Electricity Magnetism Radioactivity

Physics Light Optics Electricity Magnetism Radioactivity

Electric Current (I): The rate of flow of electric charge through a cross-section.\n Formula: I = Q / t | S.I. Unit: Ampere (A) \n
Potential Difference (V): The work done to move a unit charge between two points.\n Formula: V = W / Q | S.I. Unit: Volt (V) \n
Ohm's Law: At constant temperature, the current (I) flowing through a conductor is directly proportional to the potential difference (V) across its ends:\n Formula: V = I &times; R (where R is the constant resistance of the conductor).\n
Resistance (R): The opposition to current flow. It depends on the conductor's length (L) and cross-sectional area (A):\n Formula: R = &rho; &times; (L / A) (where &rho; is the resistivity of the material, measured in &Omega;&middot;m ).\n

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