4. Three resistors, 60.0 N, 30.0 N, and 20.0 N, are connected in parallel across a 90.0-V battery. a. Find the current through each branch of the circuit. b. Find the equivalent resistance of the circuit. 90.0 V. c. Find the current through the battery. 60.0 0 30.0 n 20.0 0
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- Using the rules for parallel circuits and Ohmslaw, solve for the missing values. ETE1E2E3E4ITl1I2l33.2AI4RT3.582R116R210R3R420PTP1P2P3P4INSTRUCTIONS: Solve the following problems. Show and COMPLETE solutions. Draw all CIRCUIT DIAGRAMS or the equivalent circuit (dummy circuit) as the case may be. Write your solutions on sheet/s of short bond paper. A battery is to consist of 20 identical cells. The emf of each cell is 1.5 V and the internal resistance is 0.20 ohm. This battery will be used to supply power to a 10 ohm lamp. Determine the current on the lamp if:1. The 20 cells are connected in series 2. The 20 cells are connected in parallel 3. The 20 cells are arranged 5 cells in series in 4 parallel rows.Two resistors R1 and R2 of 12 Q and 6 N are connected in parallel and this combination is connected in series with a 6.25 Q resistance R3 and a battery which has an internal resistance (in series with the battery e.m.f.) of 0.25 2. Determine the e.m.f. of the battery. (note: the current through 6 ohms is 0.8 A)
- 150 100 + VA- a -4V AVA -7V 81. B b Figure 2 shows a simplified model of a gas-discharge lamp. One characteristic of these lamps is that they exhibit negative resistance; in other words, as current increases the voltage drops further, making such lamps inherently unstable. As such, a current-limiting ballast is required. For the connection shown in the figure: 1. Find the equivalent Thevenin circuit of the lamp. 2. Find the ballast resistance needed to limit the current drawn from a 24-volt source to 6 amperes.In the figure below you see the sketches for the front and back of an electrical circuit board. The board is cut into a trapezoidal shape and is made of plastic. On the back of the board there is conductive paint shown here in green. On the front there are some resistors and capacitors, in addition to terminals for inserting the leads from a DC power supply. The legs of the resistors and capacitors go through the holes on the board and are soldered to the conducting paint on the back side. You also have a multi-meter which you can use as an ammeter or a voltmeter. 16 v 4700 16 10 8 O- 7 3. 6. 4 O+23. Resistors R1, R2, and R3 have resistances of 15.0 2, 9.0 2, and 8.0 2 Orespectively. R1 and R2 are connected in series, and their combination is in parallel with R3 to form a load across a 6.0-V battery. a. Draw the circuit diagram.
- Three resistors of 50 N, 100 N and an unknown resistance R are connected in parallel and the combination is connected to a 25 V source. If the total current delivered by the source is 1 A, determine the following: A. The value of R (Ans. R = 100 2) B. The current in each resistor (Ans. I1 = 0.5 A, I2 = I3 = 0.25 A) C. Which resistor dissipates the highest power? Show your solution. (Ans. R1)Which of the following statements regarding circuits are true? To find resistance in a parallel circuit, you must sum the individual resitances The direction of conventional current is the direction of positive charge flow. In a circuit, electrons flow from high potential energy (at the negative terminal) to low potential energy (at the positive terminal). When electricity is passed through a lightbulb, the electrons are 'used up' by the bulb. All voltages in a loop sum to 12V The current that flows into a resistor is the same as the current that flows out. To 'short circuit' something means there is an alternate path of less resistance for the current to flow. Switching on a light happens immediately because electrons move from the power source to the bulb incredibly quickly. A 'kilowatt-hour' is a unit of power, not energy... Two resistances of 10 and 15 ohms, each respectively are connected in parallel. The two are then connected in series with a 5-ohm resistance. It is then connected across a 12-V battery. What are the current and power?
- what is the equivalent resistance RabIn the figure the current in resistance 6 is is = 1.34 A and the resistances are R, = R, = R3 = 1.62 2, Ra = 15.5 N, R5 = 8.87 S, and R, = 3.17 N. What is the emf of the ideal battery? R R2 R Rg R4 R6 Number Units the tolerance is +/-2%A battery with E-5.00 V and no internal resistance supplies current to the circuit shown in the figure below. When the double-throw switch S is open as shown in the figure, the current in the battery is 1.10 mA. When the switch is closed in position a, the current in the battery is 1.28 mA. When the switch is closed in position b, the current in the battery is 2.09 mA. Find the following resistances (b) ₂ (2) R₂ Need Help? R₁ KO KD Feeds 1 R₂ www