Current Electricity Questions

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A clamp on ammeter is clamped on all three wires of a 120 volt circuit that is drawing 9.68 amps. What will the ammeter read as the total amperage? Select one: a. 0 A b. 4.84 A c. 19.36 A d. 21 A

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Determine all the branch currents in this circuit using Kirchhoff's Analysis. Problem Requirement: System of linear equations in 6 variables Solution: Gaussian Elimination Checking: Gauss-Jordan Reduction

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Suppose that over a certain region of space the electrical potential V is given by the following equation. V(x, y, z) = 2x2 – 3xy + xyz (a) Find the rate of change of the potential at P(6, 4, 5) in the direction of the vector v = i + j-k. (b) In which direction does V change most rapidly at P? (c) What is the maximum rate of change at P?

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Three identical resistors, each of which has a resistance of 30 Ω, are connected in a circuit in order to heat water in a glass beaker. A 24 V battery is the power source for the circuit . The three resistors may be connected in series or in parallel. (a) Using the battery and one or more of the resistors, design a circuit that will heat the water at the fastest rate when the resistor(s) are placed in the water. Draw a diagram of the circuit in the box below, using the following symbols to represent the components in your diagram. Symbols to be Used : Resistors (b) Justify the circuit design in part (a).

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A 2.0-meter length of copper wire is connected across a potential difference of 24 millivolts. The current through the wire is 0.40 ampere. The same copper wire at the same temperature is then connected across a potential difference of 48 millivolts. The current through the wire is (A) 0.20 A (B) 0.40 A (C) 0.80 A (D) 1.6 A

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(2) What is the current in a normally operating 60W, 140V lamp? (3) A potential difference of 60V is applied across a 15 ohm resistor. What is the power dissipated in the resistor? (4) A 350 W washing machine has a resistance of 9.1 ohms. What is the current? (5) How much energy is produced by a 50 volt source that generates a 5.0 A current for 2.0 minutes?

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Two charged boxes are 4 meters apart from each other. The blue box has a charge of +0.000337 C and is attracting the red box with a force of 626 Newtons. Determine charge of the red box.

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The load across a 12-V battery consists of a series combination of two resistors with resistances R₁ and R₂ . R₁ is 24Ω and the potential difference across R₁ is 5.0 V. (A)Draw the circuit diagram. (B) Find the current in the circuit. (C) Find the equivalent resistance of the circuit. (D) Find the power dissipated by the 24-Ω resistor.

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2. For the following circuit network (9 pts). 1. = 2230 mA -210 S2 377 Hz Determine the following quantities: a) The time dependent function that describes the current source (1 pts): b) The value of the capacitance (1 pts) c) The value of the inductive impedance, ZL (1 pts) d) The Thevenin equivalent circuit (i.e., VTH and ZTH when the parallel connected inductor and capacitor are considered the load impedance) and the average and reactive power across Zee Z1||Zc (1 pts)

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3. A 12.0 V battery is hooked up with three resistors (R.,R,R2) in parallel with resistances of 20 0,50 0, and 10.0 , respectively. (a) Draw a labeled circuit diagram for the circuit described (b) Calculate the equivalent resistance (c) Calculate the current passing through each resistor in the circuit

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Humberto builds two circuits using identical components. Circuit 1: A series circuit with three lightbulbs. Circuit 2: A parallel circuit with three lightbulbs. He then adds two more lightbulbs in a series with the bulbs in circuit 1 and two more lightbulbs on new branches in parallel with each bulb in circuit 2. What can he expect to see? A. All bulbs in circuit 1 will shine at the same brightness as the original bulbs, while all bulbs in circuit 2 will be dimmer than the original bulbs. B. All bulbs in circuit 1 will shine more dimly than the original bulbs, while all bulbs in circuit 2 will have the same brightness as the original bulbs. C. The original bulbs will remain at their original brightness, but the bulbs added to circuit 1 will be dimmer than the bulbs added to circuit 2. D. The original bulbs will remain at their original brightness, but the bulbs added to circuit 1 will be brighter than the bulbs added to circuit 2.

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A 18 0 and a 36 resistor are connected in parallel with a 24 V battery 1) Draw the circuit, include a voltmeter for each resistor and an ammeter to read total current and current through the 18 and 36 resistors. A 124v 1950 W 362 2) Find total resistance treat test, + + 362 . Req R2 180 3 362 1 BReq=360 Req=122 Req 3) Find total current, and current through each resistor VT- Vi = V2 BHV-24V = 24V IT = VT = I 2 = RA 240 Ve Rz = 0.67A 362 24V Reg 122 uv RI 4) Find potential drop through both resistors II - VI 182 1.3A