A 10 N resistor (R1) and a 15 Q resistor (R2) are connected in parallel to an ideal emf device which provides a potential difference of E = 12 V across its terminals. (a) Determine the electrical energy supplied to the network every second. (b) Suppose the resistors are light bulbs. The filament of light bulb R1 suddenly breaks and R1 is now an open circuit. Does the brightness of light bulb R2 increase, decrease, or remain the same?

A 10 N resistor (R1) and a 15 Q resistor (R2) are connected in parallel to an ideal emf device which provides a potential difference of E = 12 V across its terminals. (a) Determine the electrical energy supplied to the network every second. (b) Suppose the resistors are light bulbs. The filament of light bulb R1 suddenly breaks and R1 is now an open circuit. Does the brightness of light bulb R2 increase, decrease, or remain the same?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A capacitor with a capacitance has been fully charged to a total charge of 26- It is connected to a resistance R to be discharged. The time constant of the circuit is 2.5 s. What is the time required for the capacitor to reach a charge of 75% of initial value? n4 O A) O B) O D) O E)
Four long, parallel conductors carry equal currents of I = 6.40 A. The figure below is an end view of the conductors. The current direction is into the page at points A and B and out of the page at C and D. D (a) Calculate the magnitude of the magnetic field at point P, located at the center of the square of edge lengthl = 0.200 m. 25.74 µT (b) Determine the direction of the magnetic field at point P, located at the center of the square of edge length l = 0.200 m. to the left to the right upward downward into the page out of the page (c) What If? What would be the magnitude and direction of the initial acceleration of an electron moving with velocity 2.88 x 105 m/s into the page at point P? magnitude m/s² direction to the right
The circuit in the figure below contains two resistors, R, 2.20 kN and R, = 3.10 kN, and two capacitors, C, = 2.10 µF and C, = 3.10 µF, connected to a %D battery with emf & = 115 V. There are no charges on the capacitors before switch S is closed. R1 C1 7. R2 C2 3. (i (a) Determine the charge on capacitor C, as a function of time (in ms), after the switch is closed. (Use the following as necessary: t.) -t 5.15 HC 9, = %3D 598 1–e (b) Determine the charge on capacitor C, as a function of time (in ms), after the switch is closed. (Use the following as necessary: t.) HC 92 %3D
When a 36.0-V emf device is placed across two resistors in series, a current of 15.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 68.0 A. What is the magnitude of the larger of the two resistances?
The circuit in the figure below has been connected for a long time. Let R1 = 8.60 Ω and R2 = 4.20 Ω. (a) What is the potential difference across the capacitor?(b) If the battery is disconnected from the circuit, over what time interval does the capacitor discharge to one-tenth its initial voltage?
If two resistors with resistances R1 and R2 are connected in parallel, then the total resistance R, measured in ohms (Ω), is given by 1/R =1/R1 + 1/R2. If R1 and R2 are increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast (in Ω/s) is R changing when R1 = 80 Ω and R2 = 100 Ω?
A defibrillator is designed to pass a large current through a patient’s torso in order to stop dangerous heart rhythms. Its key part is a capacitor that is charged to a high voltage. The patient’s torso plays the role of a resistor in an RC circuit. When a switch is closed, the capacitor discharges through the patient’s torso. A jolt from a defibrillator is intended to be intense and rapid; the maximum current is very large, so the capacitor discharges quickly. This rapid pulse depolarizes the heart, stopping all electrical activity. This allows the heart’s internal nerve circuitry to reestablish a healthy rhythm.A typical defibrillator has a 32 μF capacitor charged to 5000 V. The electrodes connected to the patient are coated with a conducting gel that reduces the resistance of the skin to where the effective resistance of the patient’s torso is 100 Ω. If a patient receives a series of jolts, the resistance of the torso may increase. How does such a change affect the initial current…
The circuit in the figure below contains two resistors, R, 1.9 kl and R₂2.8 kf, and two capacitors, C₂ -1.9 f and C₂-3.1 uf, connected to a battery with emf E-140 V. If there are no charges on the capacitors before switch S is closed, determine the charges a, and dy on capacitors C, and C₂, respectively, as functions of time, after the switch is closed. Hint: First reconstruct th circuit so that it becomes a simple RC circuit containing a single resistor and single capacitor in series, connected to the battery, and then determine the total charged a stored in the circult. (Use th given values for R₁, R₂, C₁, C₂, and E. Use the following as necessary: t. Do not include any units in your response.) 91-42.8 AC 9269.8 R₁
The figure displays two circuits with a charged capacitor that is to be discharged through a resistor when a switch is closed. In figure (a) below, R₁ = 21.7 Q and C₁ = 5.08 µF. In figure (b) below, R₂ = 10.5 Q and C₂ = 8.00 μF. The ratio of the initial charges on the two capacitors is 902/901 = 1.82. At time t = 0, both switches are closed. At what time t do the two capacitors have the same charge? Number i 0.188 Units 00 ms (a) (b)
A charged capacitor is connected to a resistor and a switch as in the figure below. The circuit has a time constant of 2.45 s. Soon after the switch is closed, the charge on the capacitor is 50.0% of its initial charge. + Q те R (a) Find the time interval required for the capacitor to reach this charge. S (b) If R = 230 k, what is the value of C? C = μF
Calculate the current through each resistor. Assume that the values of the resistances are R 1= 24000 and R2 = 1400 ohms the emfs of the two batteries are e1 = 1.5 V and e2 = 3 V. (a) Write down the equation for the loop that travels through battery 1,resistor 1 and battery 2. (b) Write down the equation for the loop that travels through battery 2 and resistor R2. (c) Obtain the relation among three branch currents. (d) Calculate the values of the currents I1,12 and 13. (e) Calculate the power dissipated by each resistor. R1 R2 Is E1 A- В I E E E !!
Problem 2. Three resistors R1=2 ohm, R2=3 ohm, and R3=4 ohm are connected in parallel. The parallel connection is attached to a V= 6{V} voltage source. (a) What is the equivalent resistance? (b) Find the current supplied by the source to the parallel circuit. (c) Calculate the currents in each resistor and show that these add together to equal the current output of the source. (d) Calculate the power dissipated by each resistor. (e) Find the power output of the source and show that it equals the total power dissipated by the resistors. (f) draw the diagram.