2. The positive y-axis (semi-infinite line with respect to the origin) carries a filamentary current of 10 A in the - ay direction. Assume it is part of large circuit. Find H at: (a) A (4, 5, 0) (b)B (10,-12, 0)
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- Problem 9: A current passing through a resistor (R = 25 2) decreases exponentially with time as I(t) = Ioe at where Io = 5.5 A and a = 0.15 s-1. %3D Part (a) Calculate the energy dissipated by the resistor in joules during the first 10 seconds. E = || sin() cos() tan() 7 8 9 НOME E 1^ AL 4 5 6 1 2 3 cotan() asin() acos() atan() acotan() sinh() cosh() tanh() cotanh() + END O Degrees Radians VO BАСKSPАСЕ DEL CLEAR Submit Hint Feedback I give up! Part (b) Calculate the total energy dissipated by the resistor in joules as time goes to infinity.The Van de Graaf generator includes a metal sphere of radius R electrically isolated from its surround- ings except for a wire which can carry a current. When the current is a steady 5.0 μA, it takes 1.3 s for the sphere to reach its operating potential of 4.0x102 kV if it’s initially uncharged. What is R? (a) 1.5 m (b) 2.4 m (c) 0.15 m (d) 0.30 m (e) None of the aboveTaking R = 2.90 kM and & = 410 V in the figure shown below, determine the magnitude and direction of the current in the horizontal wire between a and e. magnitude Your response differs from the correct answer by more than 10%. Double check your calculations. mA from a to e direction R 2R be pe 28 4R 3R a'
- (5) Current is flowing through a cylindrical copper wire with radius 6.33mm and length 92.1cm. This wire is hooked up to two capacitors in series C1 The capacitors both have cross sectional areas of A = 179cm2. (a) At a given moment in time, the current is I electrons is vd = 9.42µF and C2 = 8.11µF. = 77.97A and the drift velocity of the 45.6µm/s. What is the number density of electrons in this wire? (b) At a given moment in time, the charge on capacitor 2 is 62.6µC. What is the total change in potential across both capacitors combined? | (c) At the moment described in part (b), what is the energy stored in capacitor 2? (d) At the moment described in part (b), what is the energy density of the electric field in capacitor 2? :Ch. 26Lets say the following electric currents flow into a junction of wires: 6.6 A (amperes or amps), -2.2 A, 6.7 A, and last but not necessarily least 9.2 A. What current in A flows out of that very busy junction?
- The current flowing in a given circuit can be described by the function: I(t) = Imax(1 - e-t/τ), where Imax = 25 A and T = 2.4 s. At what time in seconds is the current equal to 75% of the maximum current? How much charge in coulombs, passes through a point in the circuit as the current increases from 0 to 75% of the maximum current?= 30.5 0, The emfs in the figure below are &₁ = 5.00 V and ₂ = 21.0 V. The resistances are R₁ = 18.0 N, R₂ 59.0 . Find the magnitude of the current in each resistor when the switch is in the following = R3 = 46.5 , and R4 states. (a) open I₁= 1₂ = I3= 14 12 13 = 14 II (b) closed I₁ = - = = RA = ww A A A A A A A A www R₁ R₂ www R3 Ez(a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ₁ = 2.7 V, 8₂-5.3 V, and r₁ r2 = 3.9 Q. (b) What is the rate at which thermal energy appears in R? www.i R (a) Number (b) Number ww MI -48₂ i N Units Units <