I. Solve the following using Superposition Theorem. R, a. Find the total resistor. b. Current through R2. c. Voltage drop across R2 40 B, 28 V 203 R 7V
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Q: 20 A B 10
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- A regular tetrahedron is a pyramid with a triangular base and triangular sides as shown in Figure P28.73. Imagine the six straight lines in Figure P28.73 are each 10.0- resistors, with junctions at the four vertices. A 12.0-V battery is connected to any two of the vertices. Find (a) the equivalent resistance of the tetrahedron between these vertices and (b) the current in the batten.(a) What is the resistance of a 1.00 102-O, a 2.50-k O, and a 4.00-kresistor connected in series? (b) In parallel?(a) A defibrillator sends a 6.00-A current through the chest of a patient by applying a 10,000-V potential as in the figure below. What is the resistance of the path? (b) The defibrillator paddles make contact with the patient through a conducting gel that greatly reduces the path resistance. Discuss the difficulties that would ensue if a larger voltage were used to produce the same current through the patient, but with the path having perhaps 50 times the resistance. (Hint: The current must be about the same, so a higher voltage would imply greater power. Use this equation for power: P=I2 RP = .)
- Unreasonable Results A 1.58-V alkaline cell with a 0.200- internal resistance is supplying 8.50 A to a load, {a) What is its terminal voltage? (b) What is the value of the load resistance? (c) What is unreasonable about these results? (d) Which assumptions are unreasonable or inconsistent?6. The bands of 4-band resistor are arranged as Red-Green-Green-Gold. a. What is the nominal resistance value of the resistors? b. What is the resistance range?a. What should be the value of X such that the total resistance of the circuit is 22 ohms? b. What is the voltage across R4? c. How much current is flowing through R3?
- a. How much current is drawn from the source?b. What is the terminal voltage of the battery?c. What is the total resistance?d. What is the voltage drop across each device?e. What is the current in the resistor [6-ohm]? Note: Draw another schematic showing combinations of resistance [if there is any]a. What should be the value of X such that the total resistance of the circuit is 22 ohms? b. What is the voltage across R4? . How much current is flowing through R3?Which is not true for resistors? a. controls the flow of electrical current. b. resistance is it's property. c. Resistors are dangerous and cannot be dispose into trash. d. Resistor has two terminals across which X electricity must pass.
- l. Figure 6 shows an electric circuit that consists of a battery, a wite and three resistors. Hant 30 100v 52 Figure 6: An electric circuit With the aid of figure 6, answer the following questions: a. Re-sketch Figure 6 and show the directions of both current and electrons. b. Determine the total currents in the circuits, c. Determine the potential difference across each resistor. 20 d. Determine the power through the circuit e. Suppose the 4-ohm resistor is removed, will the total current will increase or decrease? Prove.1. Two resistors with resistance values of 4.5 N and 2.3 Q are connected in series or parallel across a 30 V potential difference to a light bulb. a. Calculate the current delivered through the light bulb in the two cases. b. Draw the circuit connection that will achieve the brightest light bulb. 2. Explain the term internal resistance. 3. State how you agree or disagree with the following statement. A good circuit cannot have internal resistance.1. An electric flat iron draws a current of 15 A when connected to a 110 V line. a. What is the resistance of the flat iron? b. What is the resistivity of the heating element if it is a wire that is 2.5 cm long with cross-sectional area of 2.0 x 104 m??