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- A particle accelerator produces a beam with a radius of 1.25 mm with a current of 2.00 mA. Each proton has a kinetic energy of 10.00 MeV. (a) What is the velocity of the protons? (b) What is the number (n) of protons per unit volume? (b) How many electrons pass a cross sectional area each second?A conducting rod with a circular cross-section (this rod is a cylinder) has a radius of 1o mm and is 2 metres long. The rod is made of aluminum, so its conductivity is 3.6 x 10' s/m. A potential difference (voltage) is applied at both ends of this rod and the current is I= 90 A. That's a lot of current! a. What is the resistance of the rod, when measured from one end to the other? b. Calculate the current density in the rod along its length. . Determine the electric field amplitude at all locations within the rod. d. What is the electric potential difference between the two ends of the rod.A 0.50 [mm] diameter silver wire carries a 20 [mA] current. What is the electric field in the wire?A) 0 [V/m]B) 10 [V/m]C) 0.025 [V/m]D) 0.10 [V/m]E) None of above
- In the figure, R1 = 30, R2= 62, and R3= 52. The current through Ih through R2is 4.00 A. Determine the following: 3. Voltage across the battery (8) R1 R2 R3A conducting rod with a circular cross-section (this rod is a cylinder) has a radius of 10 mm and is 2 metres long. The rod is made of aluminum, so its conductivity is 3.6 x 10' S/m. A potential difference (voltage) is applied at both ends of this rod and the current is I = 90 A. That's a lot of current! a. What is the resistance of the rod, when measured from one end to the other? b. Calculate the current density in the rod along its length. Determine the electric field amplitude at all locations within the rod. c. d. What is the electric potential difference between the two ends of the rod.What is the total current (in A) passing through the circuit if V = 12 V, R1 = 40 Q, R2 = 20 Q, and R3 = 40 0? Give your answer as only the numerical value in the SI units specified. e is interpreted as x10^ for use with large or small values; 1.01e2 is interpreted as 1.01 x 104. R2 R1 R3
- In a given fluid, positive ions, each with 2 excess protons, move to the right at a steady rate of 1.0 x 1019 ions per minute and negative ions, each with 4 excess electrons, move to the left at a rate of 3,6 × 1019 unit of charge to be 1.6x 10-19 C. Determine the current (in amperes) to the right. ions per minute. Determine the current directed to the right. Use the fundamentalConsider a wire made of copper with conductivity 6.0 × 10' 2m', which has a circular cross-section of radius 0.47 mm. In a particular circuit, this wire carries a current of 6.5 A. What is the electric field, in volts per meter, inside this wire? E = If we replace this wire with a gold one of the same size, with conductivity 4.1 × 107 2-1'm1, what will the electric field in the wire be? E =Problem 4: In the circuit above S is initially open and the capacitors C1 and C2 are initially uncharged. a) Find the current through the R₁ = 100 resistor immediately after the switch is closed. Answer: 0.08 A. b) Find the current through the R₁ = 100 resistor a long time after the switch has been closed. Answer: I = 0 A. c) Find the charge Q₁ on the capacitor C₁ and the charge Q2 on the capacitor C₂ a long time after the switch has been closed. Answer: Q₁ = 120 μC and Q₂ = 60 μС. R₁ = 100 V = 12 V R₂ = 100 C1 = 10 μF Ω www R3 = 100 C₂ = 5 µF
- An electric device delivers a current of 0.5 A for 10 seconds. How many electrons (1.6x10-19C) flow through this device? Select one: O a. 2 O b. 20 O c. 200 O d. 0.31x1020 О е. 3.1x1020Consider the following. (a) A rectangular block has the dimensions ℓ ✕ w ✕ h. When a battery with a voltage V is connected across the end faces as shown in the left figure above, a current I1 flows through the circuit. If the same battery is connected across the top and bottom faces of the block as shown in the right figure, what is the current I2 that flows through the circuit? Give your answer in terms of I1. (Use the following as necessary: ℓ, w, h, I1) I2 = ? (b) Suppose ℓ = 4.20 cm, w = 2.2 cm, and h = 1.80 cm; the battery voltage is 1.5 V and I1 = 2.50 A, determine the value of I2. (A)In the circuit shown, the potential difference VA VB = 46.0 V and the resistance R₁ = R₂ = R3 = R4 = 255 Q. The arrows for currents IA and IB indicate the direction of positive current flow. The arrows do not necessarily indicate the direction of the actual current flow at those points. Determine the current IA. IA = Determine the current IB. IB = A A R₂ www VB R₁ www R₁ www R₂ www