A 4.8-cm-diameter parallel-plate capacitor has a 0.56 mm gap. You may want to review (Pages 884-886) Part A What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at 500,000 V/s? Express your answer to two significant figures and include the appropriate units. Idisp= O T μА 3 Value Units ?
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- E H A coaxial capacitor with inner radius 5 mm, outer radius 6 mm and length 500 mm has a dielectric for which e,=6.7 and an applied voltage 250 sin 377t (V). Determine the displacement current ip and compare with the conduction current i̟.3, i,A garden is rectangular being 22 m wide and 45 m long. How long is a line drawn from one corner to the opposite corner and what angle does it make to the long side? ii, The electric current flowing in a resistor is given by I = 20 sin(100t) where I is in Amperes and t is in seconds. A, What is the maximum current? B, What is the frequency of the current? C, What is the time taken to change from zero to maximum current in each cycle?Q2. To determine the galvanometer's internal resistor R. and its maximum electric current Is, corresponding to a maximum deviation of its needle, we mount it in series with a rheostat, as shown in the adjacent figure. R a b son Reosta Galvanometre When the needle makes a maximum deviation Vab = V1 = 5 V and Rr= R1 = 80 k 2. When the needle makes 1/2 maximum deviation Vab = V2 = 2 V and Rp = R2 = 60 ko. When the needle makes 44 maximum deviation Vab = V3 = 2 V and Rr = R3 . V a) Write the relationship between V1, R1, Rc and le. b) Write the relationship between V2, R2, Re and Ic. c) Write the relationship between V3, R3, Re and Ic. d) Determine the values of Re and Ic. e) Determine the value of Rs. Answer:
- Q3: 42. Find and graph the charge q(t) and the current i(t) in the LC-circuit in Fig. 151, assuming L 1 H, C = 1 F, v(t) = 1 - e-t if 0 T, and zero initial current and charge. v(t) Fig. 151. LC-circuitA (1.91x10^2)-mA current is used to charge up a parallel plate capacitor. A large square piece of paper is placed between the plates and parallel to them so it sticks out on all sides. What is the value of the integral P B. ds around the perimeter of the paper? Express your result in T.m with three significant figures.In Fig.01, the variable cross section of a circular conductor with a non-uniform diameter that conducts a current of intensity I=5 A is shown. The radius of the cross section A1 is R1=0.4 cm. If the current density through A2 is one quarter of the value through A1, what is the radius of the conductor in A2? Fig.01 A2
- Q2) a) Prove that IdL =dQ*V, where V: is the velocity! b) In a material er-3, the electric flux density D-0.31 c/m² and the conduction current density is 10 A/m², find the frequency if o-2 mS/m? O AIn the saturation region (I-V characteristics) of JFET the value of D18 ssmemanmnssnes at specific (VGS = * .negative voltage ) a. b.c.d a: constant O b: zero O c: maximum O d: Bothaandc O4. A circular capacitor of radius R holds a conductive current I. as it begins charging. As the current charges the capacitor, the electric field between the plates begin to increase in strength of E(t) = at³ +c in Newtons per Coulomb. (a) State the expression for Maxwell-Ampere's law. What is the major dif- ference between the Maxwell-Ampere law and Ampere's Law? Show how we arrive to this solution. (b) Determine the magnetic field strength at t = 2 seconds and position from center of cross section of capacitor at r = (1/4)R in terms of µo and eo.
- The main purpose of an oscilloscope is to graph an electrical signal as it varies over time. Most scopes produce a two-dimensional graph with time on the x-axis and voltage on the y-axis. The voltage waveform on the screen looks as shown in the figure below. Here, the vertical resolution of the oscilloscope is set up to be 2 mV/division and the horizontal resolution is 2 ms/division. Time 2. Calculate the period and the frequency of the wave. VoltageQ = Qo e* (C36) d) The capacitor charge in the circuit below decays exponentially when the capacitor has an initial charge of Qo: URC. Give brief physics (not math!) explanations for the observation that the time constant (how long it takes to discharge) is proportional to both C and R. Why is the time constant proportional to R (i.e. why does it take longer when R is bigger)? Why is the time constant proportional to C (i.e. why does it take longer when C is bigger)? R CA capacitor with square plates of edge length L is being discharged by a current of 1.1 A. The figure is a head-on view of one of the plates from inside the capacitor. A dashed rectangular path is shown. If L = 11 cm, W = 4.4 cm, and H = 2.1 cm, what is the value of Bds around the dashed path? W