## Udit Gupta is teaching live on Unacademy Plus

CURRENT ELECTRICITY Udit Gupta | MNNIT Allahabad | Ex-VMC Physics Faculty

HAPTER ON Thor's quest for godliness originated here. He learns about his basics behind the powers that he possesses. It starts with Odin, his father revealing the secrets of electricity in what follows. ..

ELECTRIC CURRENT ELECTRIC CURRENT If dq coulombs of charge flows across any cross-section of a conductor in dt interval of time, then the magnitude of current I flowing through it is given by: dq dt Charges flowing constitutes current

UNIT OF CURRENT CURRENT FACTS The Si unit of current is Ampere (A) One ampere is said to flow through a conductor when a charge of 1 coulomb passes through any cross section in 1 second. The carrier of current in metals are negatively charged charges - electrons. Carrier of current on electrolyte are charged particles - ions. 1A 1C/s 1mA-10-3A. 1 -10-6A. Direction of electric current is taken as the direction of flow of positive charges.

Thor thought to himself "To channelize the strength of these small particles called charges, I should wield a conductor a0 He chose "Mjolnir" made of "URU" which had magical strength of traction towards the charges. Electric current rate of flow of lectric charge across any cross- section of a conductor.

CALCULATING AMOUNT OF CHARGE FLOWN The amount of charge flowing through a cross section of a conductor from t - ti to t tf is given by: q=| ldt Example: Find the amount of charge flown in 2s for a current given by: 1 2t (Si Unit). 0

In the next chapter Thor learns to use the Mjolnir by obtaining more knowledge about Uru's capabilities.