A copper conductor has a diameter of 12 inch and it is 148 feet long. Assume that it carriers a total DC current of 31A and p=1.72x10-8 Qm. What current density (in A/m²) exists in it?
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- An electric current in a conductor varies with time according to the expression I(t) = 100sin(120лt), where I is in amperes and t is in seconds. What is the total charge passing a given point in the conductor from t=0 to t=1/240 s?A 1·21-MF Capacitor is connected to a North American electrical outlet. (AVrms = 120V₁ f = 60.0Hz). Assuming the energy stored in the Capacitor is Zero at + = 0, determine the magnitude & the current in the wires at t = 192 Note: Answer must be in A. S.An electric current in a conductor varies with time according to the expression I(t) = 94 sin (180?t), where I is in amperes and t is in seconds. What is the total charge passing a given point in the conductor from t = 0 to t = 1/240 s?
- The equations of the currents in two parallel-connected electric devices are i1 = 11.3 sin (377t + /4) and i2 = 8.5 sin (377t - /4). What is the rms value of the resultant current?Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a voltage of 1.00102 MV, and a length of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water?The voltage V in a simple electrical circuit is slowly decreasing as the battery wears out. The resistance R is slowly increasing as the resistor heats up. Use Ohm's Law, V = IR, to find how the current I is changing at the moment when R = 356 Ω, I = 0.02 A, dV/dt = −0.01 V/s, and dR/dt = 0.06 Ω/s. (Round your answer to six decimal places.)
- A 350 in. length of conductor is connected to a source of emf and carries a steady current of 25 amp. If the cross-sectional area of the wire is 0.0063 sq.in., calculate the number of trips the electrons make during a 1day period.You connect a battery, resistor, and capacitor as in (Figure 1), where R = 14.0 Ω and C = 3.00 ×10^-6 F. The switch S is closed at t = 0. When the current in the circuit has magnitude 3.00 A, the charge on the capacitor is 40.0 × 10^−6 C. At what time t after the switch is closed is the charge on the capacitor equal to 40.0 x 10^-6 C? When the current has magnitude 3.00 A, at what rate is energy being stored in the capacitor?@ 3 9. An electric power station that operates at 35 kV and uses a 10:1 step-up ideal transformer is producing 34 MW (Mega- Watt) of power that is to be sent to a big city which is located 300 km away with only 2.5% loss. Each of the two wires are made of copper (resistivity = 1.72 x 10-8 22.m). What is the diameter of the wires? x 0.854 cm E D 80 F3 $ 4 ortor non coil that has 100 turns and 150 T maanatic field. ост 11 80 R F 5 Q F5 G C 0 H tv MacBook Air & c F7 8 ◄ PIL F8 K The fronunnay of thin DII 9 DD F9 Show my other submissions O A O A F10 F10 (1 F11 F12
- For the circuit shown in Fig. Q1(a), the capacitor is initially charged to 3.5 V with polarity shown. compute the voltage vc(t) and the current ic (t) when the switch (S) is closed. I = 5.5 mA ↑ R₁ R₂ 2.6 ΚΩ • 8.7 ΚΩ Fig. Ql(a) S C = 3.3 uF + 3.5 V25. A coaxial cable consists of a solid inner cylindrical conductor of radius 2 mm and an outer cylindrical shell of inner radius 3 mm and outer radius 3.5 mm. A current of 15 A flows down the inner wire and an equal return current flows in the outer conductor. If we assume that the currents are uniform over the cross section of the conductors, then calculate the magnitude of the enclosed current for use in Ampere's Law at a radius of 3.25 mm. 7.2 A a. b. C. d. e. 3.8 A 7.8 A 11.2 A 7.5 A. In the region 0SEE MORE QUESTIONS