For an ideal battery (r = 0 $2), closing the switch in (Figure 1) does not affect the brightness of bulb A. In practice, bulb A dims just a little when the switch closes. To see why, assume that the 1.50 V battery has an internal resistance r = 0.60 2 and that the resistance of a glowing bulb is R= 4.00 2. Part A What is the current through bulb A when the switch is open? Express your answer with the appropriate units. • View Available Hint(s) HẢ IA, open Value Units %3D Submit Part B What is the current through after the switch has closed? Express your answer with the appropriate units. • View Available Hint(s) Figure 1 of 1> HA IA, closed = Value Units Submit Part C By what percent does the current through A change when the switch is closed? Express your answer as a percentage. • View Available Hint(s) Pearson

For an ideal battery (r = 0 $2), closing the switch in (Figure 1) does not affect the brightness of bulb A. In practice, bulb A dims just a little when the switch closes. To see why, assume that the 1.50 V battery has an internal resistance r = 0.60 2 and that the resistance of a glowing bulb is R= 4.00 2. Part A What is the current through bulb A when the switch is open? Express your answer with the appropriate units. • View Available Hint(s) HẢ IA, open Value Units %3D Submit Part B What is the current through after the switch has closed? Express your answer with the appropriate units. • View Available Hint(s) Figure 1 of 1> HA IA, closed = Value Units Submit Part C By what percent does the current through A change when the switch is closed? Express your answer as a percentage. • View Available Hint(s) Pearson

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 55P: A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any...

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A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?
Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?
Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?
The- pair of capacitors in Figure P28.63 are fully charged by a 12.0-V battery. The battery is disconnected, and the switch is then closed. Alter 1.00 ms has elapsed, (a) how much charge remains 011 the 3.00-F capacitor? (b) How much charge remains on the 2.00-F capacitor? (c) What is the current in the resistor at this time?
Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a voltage of 1.00102 MV, and a length of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water?
A potential difference of 1.00 V is maintained across a 10.0- resistor for a period of 20.0 s. What total charge passes by a point in one of the wires connected to the resistor in this time interval? (a) 200 C (b) 20.0 C (c) 2.00 C (d) 0.005 00 C (e) 0.050 0 C
In the circuit shown in figure 1, epsilon is equal to 41.0 V, R1= 4 ohms, R2= 6 ohms, and R3= 3 ohms. (D) for the 3 ohm resistor calculate the current through the resistor with S open. (E) what is the potential difference Vabbetween points a and b when the switch S is closed? (F) for the 4 ohm resistor calculate the current through the resistor with S closed. (G) for the 6 ohm resistor calculate the current through the resistor with S closed (H) for the 3 ohm resistor calculate the current through the resistor with S closed. (I) for each resistor, does the current increase or decrease when S is closed?
in the circuit below, when the switch S is open, the current through R1is i1(open)= 1.636 A. When the switch is closed,this current changes to i1(closed)= 1.565 A. What are the emf and internal resistance of the battery?
R1 R2 3. Given that the battery has a potential of 12 V, resistors R1 = 1N and R2 = 32, and Capacitance C = 10 µF, find the current through R2 after the switch has been closed at t = 0 and t = oo. Once the switch has been opencd up after some time (after capacitor is charged), find the time that the current through R1 will rcach half its initial value.
In the circuit shown in (Figure 1) all meters are idealized and the batteries have no appreciable internal resistance. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A complex network. Figure 25.0+ V 100.0 Ω a 115.0 S V 36 V 75.0 A Ω b 1 of 1 impi pitivas par Part C With the switch closed, find the reading of the voltmeter. Express your answer in volts. V = Submit Part D I = ΑΣΦ With the switch closed, find the reading of the ammeter. Express your answer in amperes. V7 ΑΣΦ Submit Request Answer Request Answer ? V A
What is the current I through the resistor at t= 50 micro seconds, and immediately after the switch is closed? What is the charge Q on the capacitors at t= 200 micro seconds?
The circuit below contains three 100-W light bulbs and a capacitor. The emf ε = 110V. At the instant the switch S is closed, which light bulb is brightest?