A battery (ɛ = 10V) is connected the six light bulbs (L, throughL6) in the following circuit. All light bulbs have the sameresistance of 10 N. After the switch K is closed, the bulbs are litup. Which of the followings are true%3DI. L3 and L4 bulbs have equal brightnessII. If L, and L, bulbs burn out, no other bulb in the circuit willglow.III. The EMF source generates new electrons and supplies them tothe electric circuit.Leefe25Only II and IIOnly I and IIIOnly IIOnly IIOnly II, II, and IIIOnly I and II

Only I and 3rd only Current L3 and L4 are same and they have same resistance R=10 ohm So power P…

Answered: L4 bulbs have equal brightness nd L,…

L4 bulbs have equal brightness nd L, bulbs burn out, no other bulb in the ci MF source generates new electrons and suppli circuit. 26

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter28: Direct-current Circuits

Section: Chapter Questions

Problem 28.49AP: Assume you have a battery of emf and three identical lightbulbs, each having constant resistance R....

See similar textbooks

Similar questions

A car battery with a 12-V emf and an internal resistance of 0.050 is being charged with a current of 60 A. Note that in this process, the battery is being charged. (a)What is the potential difference across its terminals? (b)At what rate is thermal energy being dissipated in the battery? (c) At what rate is electric energy being converted into chemical energy?
Assume you have a battery of emf and three identical lightbulbs, each having constant resistance R. What is the total power delivered by the battery if the light-bulbs are connected (a) in series and (b) in parallel? (c) For which connection will the lightbulbs shine the brightest?
The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V emf, whereas an alkaline cell has a 1.58-V emf. The radio has a 3.20 resistance.(a) Draw a circuit diagram of the radio and its battery. Now, calculate the power delivered to the radio (b) when using a nicad cells, each having an internal resistance of 0.0400 , and (c) when using an alkaline cell, having an internal resistance of 0.200 . (d) Does this differenceseem significant, considering that the radio's effective resistance is lowered when its volume is aimed up?
Two 1.50-V batterieswith their positive terminals in the same directionare inserted in series into a flashlight. One battery has an internal resistance of 0.255 , and the other has an internal resistance of 0.153 . When the switch is closed, the bulb carries a current of 600 mA. (a) What is the bulbs resistance? (b) What fraction of the chemical energy transformed appears as internal energy in the batteries?
As in Example 27.2, consider a power supply with fixed emf and internal resistance r causing current in a load resistance R. In this problem, R is fixed and r is a variable. The efficiency is defined as the energy delivered to the load divided by the energy delivered by the emf. (a) When the internal resistance is adjusted for maximum power transfer, what is the efficiency? (b) What should be the internal resistance for maximum possible efficiency? (c) When the electric company sells energy to a customer, does it have a goal of high efficiency or of maximum power transfer? Explain. (d) When a student connects a loudspeaker to an amplifier, does she most want high efficiency or high power transfer? Explain.
In the circuit shown in figure 1, epsilon is equal to 41.0 V, R1= 4 ohms, R2= 6 ohms, and R3= 3 ohms. (A) what is the potential difference Vab between points a and b when the switch S is open? (B) for the 4 ohm resistor, calculate the current through the resistor with S open. (C) for the 6 ohm resistor, calculate the current through the resistor with S open. (D) for the 3 ohm resistor calculate the current through the resistor with S open. (E) what is the potential difference Vab between 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?
The current through the 30-Ω resistor in the above circuitis measured to be 0.15 A. (a) What is the potential difference across each resistor in this circuit? (b) What is the emf εof the battery?
A 20.0 Ω resistor, R1, with a maximum power rating of 5.0 W is to be connected in series to another resistor, R2 in a circuit with a 24-V battery. 1. What is the total resistance of the series circuit? 2. What is the maximum allowable current in the resistor, R1? 3. What is the resistance of the second resistor, R2?
The figure below shows a capacitor, with capacitance C = 35.0 µF, and a resistor, with resistance R, = 57.5 kΩ, connected in series to a battery, with = 31.0 V.The circuit has a switch, which is initially open. a) What is the circuit's time constant (in s)? b)After the switch is closed for one time constant, how much charge (in C) is on the capacitor?
1) A circuit containing a linear resistor is powered by a 25 Vbattery and has a current of 5 Arunning through it. a) What is the resistance in the circuit? b) At what rate does the resistor dissipate energy? c) What would the current in the circuit be if the voltage were doubled?
The circuit on the right contains three resistors, A, B, and C, which all have equal resistances. The emf is 110V. Which resistor dissipates the most thermal energy after the switch is closed? (Resistor A, B, or C). Why? What other quantity is maximized to tell you that the energy is maximized?
Part 1: A 649-Ω resistor, an uncharged 4.85-μF capacitor, and a 18.8-V emf are connected in series. How long, in ms, after the circuit is connected does the current in the resistor fall by 36.8% of its initial value? Part 2: A 395-Ω resistor, an uncharged 5.09-μF capacitor, and a 10.5-V emf are connected in series. What is the current, in mA, after 3 time constants is flowing through the resistor? Part 3: A 489-Ω resistor, an uncharged 7.14-μF capacitor, and a 14.6-V emf are connected in series. What is the charge, in microCoulombs, has accumulated in the capacitor after 2 time constant(s)?