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- A 10.00-meter long wire cable that is made of copper has a resistance of 0.051 ohms, (a) What is the weight if the wire was made of copper? (b) What is the weight of a 10.00-meter-long wire of the same gauge made of aluminum? (c)What is the resistance of the aluminum wire? The density of copper is 8960 kg/m3 and the density of aluminum is 2760 kg/m3.A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?(a) During surgery, a current as small as 20.0A applied directly to the heart may cause ventricular fibrillation. If the resistance of the exposed heart is 300 what is the smallest voltage that poses thisdanger? (b) Does your answer imply that special electrical safetyprecautions are needed?
- 1.000 120V 2.00 ng C1.00 Given the electric circuit as shown on the right, (a) Find the potential of point a with respect to point b. (b) If points a and b are connected by a wire with negligible resistance, find the current in the 12.0-V battery. 2.00 nE L00n KOV 200Using Kirchhoff's rules, find the following. (₁ = 70.4 V, E₂ = 60.8 V, and 3 = 78.4 V.) 4.00 ΕΩ www R$ IRI = IR2 = IR3 b = a E₁ 9.00 ΕΩ ww R₁ (a) the current (in mA) in each resistor shown in the figure above mA R₂ с mA E₂ mA · 3.00 ΚΩ d E, (b) the potential difference between points c and f (Give the magnitude of your answer in volts and select the point of highest potential.) magnitude of potential difference V point at higher potential ---Select--- (c) What If? If all of the resistors in the circuit were decreased in value by a factor of 1,000, would the current in each resistor simply increase by a factor of 1,000? Explain your answer.Using Kirchhoff's rules, find the following. (₁ = 70.6 V, E₂ = 61.0 V, and E3 = 79.0 V.) 4.00 ΕΩ ww R3 = IR₂ IR3 E₁ = R₂ 2.00 ΚΩ R₁ (a) the current in each resistor shown in the figure above IR₁ E₂ mA mA mA 3.00 ΚΩ d Es (b) the potential difference between points c and f magnitude of potential difference point at higher potential ---Select--- ✓ V
- Using Kirchhoff's rules, find the following. (E, = 71.0 V, E2 = 62.0 V, and E, = 79.8 V.) 4.00 ka |E, |E. Ra R$ 3.00 kN 2.00 kN R (a) the current (in mA) in each resistor shown in the figure above IR2 mA mA (b) the potential difference between points c and f (Give the magnitude of your answer in volts and select the point of highest potential.) magnitude of potential difference point at higher potential --Select--- v (c) What If? If all of the resistors in the circuit were decreased in value by a factor of 1,000, would the current in each resistor simply increase by a factor of 1,000? Explain your answer.I've got the power! In the circuit shown, a 10.0 V bat- tery with an internal resistance of 5.00 N is connected to a 15.0 N external resistor. What is the rate of dissipation in the battery? 10.0 V 5.00 N A. 1.25 W С. 3.75 W ww- 15.0 N В. 2.50 W D. 5.00 W100 Jo 13.4 K/s & O 48| 1:46 pm O ... Imssb1.mutah.edu.jo 3 Marked out of 10.00 P Flag question An electric heater is constructed by applying a potential difference of 126.3V across a wire with a resistance of 5.0 Q. What is the power rating of the heater? Select one: А. 3.80 В. 3.19 C. 3.54 D. 2.66 E. 2.90 Previous page Next page
- A 597×10−6 F597×10−6 F capacitor is discharged through a resistor, whereby its potential difference decreases from its initial value of 86.9 V86.9 V to 26.1 V26.1 V in 4.11 s4.11 s. Find the resistance ?R of the resistor.An uncharged capacitor with C = 39 μF and a resistor with R = 75 Ω are connected in series with a battery of ε = 7.5 V. a) Calculate the numerical value of τ in μs. b) Calculate the numerical value of Q in μC.A 537×10−6 F capacitor is discharged through a resistor, whereby its potential difference decreases from its initial value of 86.5 V to 21.9V in 4.65 s. Find the resistance ?R of the resistor.