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q explain working of ammeterin order to measure the current through a wire or line of a circuit an ammeter is connected in series with the line a
the subject of electrical measurements is such a large one that entire books have been written on the topic only a few basic principles will be
consider a source of voltage vt 10 radic2 sin 2t v with an internal resistance of 1800 omega a transformer that can be considered ideal is used to
q show the characteristics of general - purpose capacitorsthe working voltage for a capacitor is generally specified by themanufacturer thereby
q what do you mean by lumped-circuit elements electric circuits or networks are formed by interconnecting various devices sources and components
q what do you mean by conductors and insulatorsin order to put charge in motion so that it becomes an electric current one must provide a path
q three waveforms seen on an oscilloscope are shown in figure if the horizontal scale is set to 50 ms per division 500 ms for the entire screen width
q in the wheatstone bridge circuit shown in figure r1 16 r2 8 and r3 40 r4 is the unknown resistance rm is the galvanometer resistance of 6 if no
q admm digital multi meter reads true rms values of current if the peak value of each of the following periodic current waves is 5 a find the meter
q error specifications on a 10-a digital ammeter are given as 007 of the reading 005 of full scale 0005 of the reading per degree celsius and 0002 of
q a current of 65 a is measured with an analog ammeter having a probable error of plusmn 05 of full scale of 100 a find the maximum probable
q a voltmeter with a full scale of 100 v has a probable error of 01 of full scale when this meter is employed to measure 100 v find the percent of
q the current sources in figure are given to be ia 30 a and ib 50 a for the values of r1 20 r2 40 and r3 80 finda the voltage vb the currents
q some element voltages and currents are given in the network configuration of figure determine the remaining voltages and currents also calculate
q a transformer is rated 10 kva 220110 v rms consider it an ideal transformera compute the turns ratio and the winding current ratingsb if a 2-load
q a60-hz 100-kva 2400240-vrms transformer is used as a step-down transformer from a transmission line to a distribution system consider the
q consider an amplifier as a voltage source with an internal resistance of 72 find the turns ratio of the ideal transformer such that maximum power
q consider a pair of coupled coils as shown in figure of the text with currents voltages and polarity dots as indicated show that the mutual
q the inductance per unit length in hm for parallel-plate infinitely long conductors in air is given by l micro0dw 4pitimes10-7 dw where d and w
q the energy stored in a 2-microh inductor is given by wlt 9e-2t microj for t ge 0 find the inductor current and voltage at t 1
q the energy stored in a 2-microf capacitor is given by wct 9e-2t microj for t ge 0 find the capacitor voltage and current at t
q determine the voltages vx using voltage division and equivalent resistor reductions for the circuits shown in
q with a direct current of i a the power expended as heat in a resistor of ris constant independent of time and equal to i2r consider problem and
q let vt vmax cos omegat be applied to a a pure resistor b a pure capacitor with zero initial capacitor voltage and c a pure inductor with zero
q a practical current source is represented by an ideal current source of 200 ma along with a shunt internal source resistance of 12 k determine the