An ideal battery is connected to an external resistor. When 3 N is added, the current drops from 9 A to 5 A. Find the value of the resistor and the emf of the battery. r = emf = V
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- For the circuit shown in the figure, determine the magnitude of the currents 12, 13, and 14 passing through batteries 2, 3, and 4, respectively. In each case, determine whether the battery is supplying power or being charged. The batteries and resistors in the circuit are assumed to be ideal and have the given properties. 8₁ = 30.0 V 82=4.50 V 83 = 22.5 V 84 = 1.50 V R₁ = 25.02 R₂ = 20.0 2 R₁ = 79.0 2 11 Incorrect 0.36 Incorrect 4.36 Incorrect A ww R₂ Battery 2 is being charged. O supplying power. Battery 3 is O supplying power. O being charged. Battery 4 is supplying power. being charged. www mit R₂ 8₂ R₁ wwIn the figure the current in resistance 6 is i6 = 1.48 A and the resistances are R₁ = R₂ = R3 = 2.37 02, R4 = 15.10, R5 = 8.11 Q2, and R6 = 3.16 Q. What is the emf of the ideal battery? Number i E www R₁ Units www R3 www R₂ R₁ www R₂ R₁A 6.0 Q resistor and a 3.0 Q resistor are connected in parallel to a 1.5 V battery of negligible internal resistance. What is the current in the 3.0 Q resistor? Select one: 0.75 A 0.17 A 0.25 A 2.00 A 0.50 A
- Four resistors are connected to a battery as shown in the figure. The current through the battery is I, the battery's electromotive force (efm) is 7.20 V, and the resistor values are R1 = R, R2 = 2R, R3 = 4R, and R4 = 3R. Find the voltage across each resistor.You charge an initially uncharged 72.9 mF capacitor through a 27.9 2 resistor by means of a 9.00 V battery having negligible internal resistance. Find the time constant t of the circuit. T = S What is the charge Q on the capacitor 1.71 time constants after the circuit is closed? Q = C What is the charge Qo after a long amount of time has passed? CA capacitor with a capacitance of 3.5 μF is initially uncharged. It is connected in series with a switch of negligible resistance, a resistor with a resistance of 19 kΩ, and a battery that has a potential difference of 170 V. What is the charge Q, in microcoulombs, on the capacitor when the current in the resistor equals one half its maximum value.