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1 1 1 1, = + +, Rp R1 R2 R3, , Rs= R1+R2+R3+ ..., , Parallel, , Series, , Amount of heat, H = VIt = I2Rt = (V2/R)t, , At constant temperature, V = IR, , System of, resistances, , Where, Unit:ohm W, r= resistivtiy, depends, Formula:R=rL/A, only on, temperature Dependence:, and material •temperature, •material, •Length, •area, , Electric heater, , Ohm's Law, , Heating effect, of current, , Fuse, , Heat in, to work, , Bulb, , Resistance, , Electric, current, , ELECTRICITY, , Rate of flow of, electric charges, Unit:ampere, , Defination:, Electric energy, per unit time, , Power, , Unit : watt(W), Formula:2, P=I2R= V =VI, R, , House hold, electricity, , Electric, Potential, , Circuit, Diagram, Ammeter in series with, the circuit, , Commercial unit:, KWH=3.6×106J, , kWh Meter, , Parallel combination, of resistances, , Main Fuse, , Connecting Wire, , V, A, , + –, , Cell, , Open, , Close, , Bulb:, , Company Fuse or, Pole Fuse, Local Earthing, , Voltmeter, Connected, in parallel, with the, resistor, , Switch:, , N, L, , Galvanometer:, Double Pole Switch or Main Switch, , Formula:I=Q/t, Measurement:, by ammeter, , Unit:volt(V), , Resistor, , L, N, E, , Definition:, Work done to move, a unit charge, , G, , A, , Formula:V=W/Q, Measurement:, by voltmeter, , V