![]() ![]() ![]() Under what value of the variable resistance given, power transferred to the fans will be maximum? The power source of the fan is a dc source with an internal resistance of 60 oh. The mathematical methods of electrostatics make it possible to calculate the distributions of the electric field and of the electric. Charges reach their equilibrium positions rapidly, because the electric force is extremely strong. The regulator provided with the fan is a fixed resistor and a variable resistor in parallel. electrostatics, the study of electromagnetic phenomena that occur when there are no moving chargesi.e., after a static equilibrium has been established. The circuit given below is for the operation of an industrial fan. So the resistance R c of the transmission cable is considerable. Hence the power wasted in connecting the wires is inversely proportional to V². The wires which are connected to the device from the power station has finite resistance R c. So if V is the voltage across R and current I then, So how do we minimize the power loss in transmission cables? Let us consider a device R to which a power is to be delivered via the cables having resistance R c. Now we know that the transmission of power is very costly. The application of electrical power is that it is transmitted from the power stations which later on reaches our homes and the industrial factories via transmission cables. The above equation is the power loss in a conductor of resistance R which carries the current I. One watt is the power consumed by the device catting 1A of current when operated at a potential difference of 1 V. The rate at which work is done in bringing the charged particles from one point to another is known as electric power. The rate at which the electric energy enters the portion of the circuit is called the electrical power input. Wheatstone Bridge, Meter Bridge and Potentiometer.In fact there is no limit, but it does get weaker the further we go. Electric charge can be felt far away (called an electric field). The formula for electric power is given by P VI where, P is the power V is the potential difference in the circuit. The idea behind all of electricity is: We sum it up by saying: Like charges repel, and opposites attract. Atmospheric Electricity and Kirchhoff’s Law It is one of the 4 basic forces of the Universe.Combination of Resistors – Series and Parallel.Drift of Electrons and the Origin of Resistivity.ΔW = V ΔQ = VI Δt Browse more Topics Under Current Electricity The amount of energy dissipated as heat in a conductor in a time interval Δt is, Conservation of total energy is ΔK = I V Δt > 0. Here if the charges in the conductor move without collisions, their kinetic energy would also change. NOW, in a time interval Δt, an amount of charge ΔQ is equal to IΔt moves from point A to B of the circuit and the work was done by the electric field is equal to the product of V and ΔQ. As we know that current is flowing from A to B so V(A) >V(B) and the potential difference across AB is V = V(A) – V(B) > 0 Let us denoted the electric potential of A and B as V(A) and V(B). To under the concept of electric energy, let us consider a conductor carrying the current I and potential difference V between the two endpoints A and B. ![]()
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