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- Many important devices incorporate circuits in which capacitors are altermately charged ane discharged. These include heart pacemakers, flashing traffic lights, automobile turn signals Activity 11 atano In the circuit shown in the figure below, find o -A erti ni 0 VA oR (a) the current in resistor R;-) berlosen aesd episo 1otios1eit.omil (b) the resistance R; and (c) the unknown emf ɛ.uotio erli to upa emit sulsy is ww riobexelen 10 inslenoo emd erl 4,00 A fiuonio 0-A 1ol Instenco amit x 6.00 6.00 A ww 3.00 0 ot19s9 eli lsme ai eonslaleen ert oiup aeperlo R-C Circuits ema al1 abnopee ni ei 1 to linu erni vDup eierio 10tiosqeo er brns woll ot in and electronic flash units. Understanding what happens in such circuits is of great practica Importo ert nelle acdniuYou have a capacitor that's discharging through a resistor toward zero voltage. What fraction of the inital voltage will the capacitor have after time 2RC?A capaci ts chaoge o at a petential btential f the mltage applied to vol differende ov. What happens applied to batle@y the is capacitor doubled beard buttons 02 Many Conputes key bonstracted of rapacitos. citoas. ade key is pushed dain, the soft morable plate and is compiessed. When a msulater bw the fined plate the key is plessed, what to heppens the bepocitance: e, @s. Two capacitas conducting.'Left plate of capacitoos aoe 企式 Sbattery capacitos 1 and the aght plate of capaci too 2 cennected to the thay peom an iso lated systom, that is initially anchanged are teominal of batteay S. and must continue zeh net cholge-Why to have the net chorge is メ ズ
- (6) Calculate the valui of resistors having colou bands in the following order. tù Blue, Grey Orange e, Red, Silver cii, Red, Green , Yellow, Brown, Gold, BlueCan u elaborate the explanation? Does't brightness of lamp depend on power why did they mention only current? How does moving contact to Q increase resistance which then decreases voltage?The puncture resistance of the insulator used in an AA cable with a conductor cross section of 150mm2 is 200 Kv / cm for the most convenient layout. What is the maximum effect value of the voltage that can be applied to this cable with relative dielectric coefficient Er = 4.4 and the capacity of the unit length of the cable? (Take the dielectric constant of the gap, 8,86.10e-12)
- My homework asks : rest is given in the question. Can you help with my homework? In the circuit in the figure, two identical parallel metallic plates, with identical etallic arcIt has been connected to 100 V battery. Switch on position, plates unloaded,the gap between them is d = 4 mm and the surface of one plate is 1778 m2.When the switch is turned off, the distance between the plates is reduced by 0.5 times. EachWhat is the spring constant of a spring in units of Newton / meter? Eo = 9 x 10-12 C2 / Nm2Using the exact exponential treatment, find how much time is required to charge an initially uncharged 50-uF (micro-Farad) capacitor through a 75 M-Ohm (mega-ohm) resistor to 60.0% of its final voltage.When applying Kirchhoff's voltage law, if you measure the voltage across a battery from the negative terminal to the positive terminal, it is considered ; when you measure the voltage difference across a resistor R oppositive the flow of current it is considered O positive; negative zero; zero negative; negative O positive; positive negative; positive
- A voltage V is connected across a wire of length L andradius r. How is the electron drift speed affected if (a) L isdoubled, (b) r is doubled, (c) V is doubled, assuming ineach case that other quantities stay the same?Suppose a circuit contains an electromotive force (a battery) that produces a voltage of E(t) volts (V), a capacitor with a capacitance of C' farads (F), and a resistor with a resistance of R ohms (N). is the charge (in coulombs), so in this case The voltage drop across the capacitor is where Q C' Kirchhoff's Law gives Q RI+ = E(t). с Since I = dQ R + dt dQ dt 1 Q we have the differential equation = E(t). Suppose the resistance R is 200, the capacitance C is 0.1F, a battery gives a constant voltage E of 30V, and the initial charge is Q(0) = 0 coulombs. Find the charge Q(t) and the current I(t) at time t. Q(t) = I(t) =A block of weakly-conducting material with conductivity sigma has two pieces of metalembedded inside, which form a capacitor with capacitance C.(a) Find the resistance R between the two pieces of metal.(b) At t = 0, the two pieces of metal have a potential difference V0, and at future times t not equal to 0the potential is V (t) = V0e-t/TFind T