(a) Calculate the Thevenin resistance across the terminal AB in the circuit above. (b) Calculate the Thevenin voltage across the 4 ohm resistor. (c) Calculate the current across the 4 ohm resistor.
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(a) Calculate the Thevenin resistance across the terminal AB in the circuit above.
(b) Calculate the Thevenin voltage across the 4 ohm resistor.
(c) Calculate the current across the 4 ohm resistor.
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- If a wire of resistance R is stretched uniformly so that itslength doubles, by what factor does the power dissipatedin the wire change, assuming it remains hooked up to thesame voltage source? Assume the wire’s volume and densityremain constantA 10-Ω resistance is connected in series with two resistances in parallelof 7.5-Ω and R. What is the ohmic value of R if the total current drawnfrom a 20-V dc source is 1.5 A?The capacitance in the figure circuit shown is C-0.30µF,, the total resistance is 20kΩ and the fem battery is 12 V. Determine a) the time constant b) the maximum charge that the capacitor could acquire, c) thetime it takes for the load to reach 99% of that value, d) current I when the Q load is half its value maximum, e) the maximum current and f ) the Q load when current I is 0.20 of its maximum value.
- (!) THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN R2 HERE. The emf source, R1 C 3.5 V, of the circuit shown in the figure has negligible internal 1.4 Q and R2 = 4.5 Q. The resistance. The resistors have resistances R1 capacitor has a capacitance C = - 4.8 µF. A) Determine the time constant t, in units of microseconds, for charging the capacitor. Answer: B) What is the charge Q on the capacitor in units of microcoulomb? Ar wwwGiven a 12V battery with internal resistance 0.5ohm as shown in the circuit below. Determine : (a) How much current is drawn from the battery? (b) What is the terminal voltage, VT of the battery? (c) How much current flow through the 5.0 ohm resistor?(d) Finally, consider the following circuit constructed with both copper (blue) and nichrome (orange) wires. + Assume all wires in the circuit have a diameter of 1.024 mm. If the total length of copper wire is 25 cm, the total length of nichrome wire is 115 cm (this wire is coiled so the length is greater than it appears in the figure), and a voltage of 1.5 V is applied to the circuit, what current will flow? I = 0.0210 ХА
- Given the following circuit, find theequivalent resistance and the voltageacross R2. Let V = 16 V, R1 = 4 Ω, R2 =2 Ω, R3 = 6 Ω, R4 = 3 Ω, and R5 = 5 Ω .The internal resistance of a 1.35-V mercury cell is 0.030 Ωwhereas that of a 1.5-V dry cell is 0.35Ω Explain whythree mercury cells can more effectively power a 2.5-Whearing aid that requires 4.0 V than can three dry cells.