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All electric formula in one video#1kilowatt - Duration: 5:13. The centimetre–gram–second units of current is the electrostatic unit of charge (esu) per second. V = I x R; V = P / I; V = √ (P x R) Voltage or Electrical Potential Formulas in Single Phase AC Circuits. 14:58 . The electric current flowing per unit area of cross-section of conductor is called current density. I 3-phase = (746 P hp) / (1.732 V μ PF) (8) where. Current Electricity Revision in 15 mins Physics Class 12 - Duration: 14:58. fundamenthol.com 14,522 views. When the potential difference is applied across a wire, then loosely attached free electrons will start moving towards the positive terminal of the cell. (a) V = IR , Here, R = (ml/nAe 2) (1/) (b) R=ρl/A (c) ρ = 1/σ (d) v d = (qE /m) (e) I = neAv d (f) ρ = m/ne 2 (g) σ = ne 2 /m. A common unit of electric current is the ampere, which is defined as a flow of one coulomb of charge per second, or 6.2 × 10 18 electrons per second. 5. With just a handful of basic mathematical formulas, you can get pretty far in analyzing the goings-on in electronic circuits and in choosing values for electronic components in circuits you design. Answer: The power required from the battery can be found using the electric power formula: P = VI. P = (12.0 V)(0.9 A) P = (12.0 J/C)(0.9 C/s) P = 10.8 J/s. The conducting material consists of a large number of free electrons which is moving from one atom to the other at random. These laws are straightforward, but […] Class 12 Physics Current Electricity – Get here the Notes for Class 12 Physics Current Electricity . Search Search i = Current, g = Length of the gap between the solenoid and a piece of metal, a = Area n = Number of turns, Magnetic constant = 4 x PI x 10-7. It plays an important role in our daily life & we cannot imagine life without it. Formulas: Unit Current I I = Q / t. Q = Charge. Electricity and electrical phenomenon have a lot of applications in our day to day life and they also gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and the flow of electrical current. Electrical Current Formulas in Three Phase AC Circuit. Voltage or Electrical Potential Formulas. Electric current is the rate at which electric charge flows past a point on the electric circuit. Free PDF download of Physics Class 12 Chapter 3 - Current Electricity Formulas Prepared by Expert Teachers at Vedantu.com. Electric current and Drift velocity:- I = q / t = nAve. The diagram at the right depicts a conducting wire. P 3-phase = electrical power 3-phase motor (kW) PF = power factor electrical motor. Electric … Current density (J) = I / A Its S1 unit is ampere metre -2 and dimensional formula is [AT -2 ]. Candidates who are ambitious to qualify the Class 12 with good score can check this article for Notes. Current electricity formula sheet - Free download as PDF File (.pdf), Text File (.txt) or read online for free. I = P / √3 x V x Cosθ . Electrical & electronic formulas - Basic electronics, electrical units, symbols, basic concepts, DC/AC circuit laws, resistor color code This is possible only when you have the best CBSE Class 12 Physics study material and a smart preparation plan. P = 10.8 W