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Q. Define Resistance in lumped-circuit?
An ideal resistor is a circuit element with the property that the current through it is linearly proportional to the potential difference across its terminals,
i = v/R = Gv, or v = iR
which is known as Ohm's law, published in 1827. R is known as the resistance of the resistor with the SI unit of ohms (), and G is the reciprocal of resistance called conductance, with the SI unit of siemens (S). The circuit symbols of fixed and variable resistors are shown in Figure, along with an illustration of Ohm's law. Most resistors used in practice are good approximations to linear resistors for large ranges of current, and their i-v characteristic (current versus voltage plot) is a straight line.
The value of resistance is determined mainly by the physical dimensions and the resistivity ρ of the material of which the resistor is composed. For a bar of resistive material of length l and cross-sectional area A the resistance is given by
where ρ is the resistivity of the material in ohm-meters ( · m), and σ is the conductivity of the material in S/m, which is the reciprocal of the resistivity.Metal wires are often considered as ideal
Loudspeakers using single driver are unable to cover the entire frequency band from low frequency to high frequency. Sometimes multiband frequency is required for the bass enhancem
Q. The voltage across a parallel combination of a 100- resistor and a 0.1-µF capacitor is 10 cos(5000t +30°) V. Determine the admittance of the parallel combination and find the c
Q. The response v(t) of a linear system to a unit-step excitation i(t) is given by v(t) = (5 - 3e -t + 2e -2t ) u(t). Determine the transfer function H(s) = V (s)/I (s).
Explain protected mode addressing. This addressing permits access to data and programs located as the first 1M byte of memory, with in the first 1M byte of memory. Addressing
I´m looking for some help to identify some electronic parts, i have this led driver with preset dim levels that i can reach with switching the power on and off. The driver worked r
The resistance of 1.5 km of wire of cross-sectional area 0.17 mm 2 is 150Ω. Determine the resistivity of the wire.
Question: a) Give one reason why a "subroutine" could be written into the body of the main program. b) With the help of the diagram below, write down the sequence of the ni
working of 4:1 demultiplexer
Estimate the software tasks required for developing the product. These are likely to include the development of various software routines, associated documentation and verification
Q. Consider a full-wave single-phase bridge recti?er circuit with dc motor load, as shown in Figure (a). Let the transformer turns ratio be unity. Let the load be such that the
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