Incandescent light bulbs are being replaced with more efficient LED and CFL light bulbs. Is there any obvious evidence that incandescent light bulbs might not be that energy efficient? Is energy converted into anything but visible light?

Q: Water flows over a section of Niagara Falls at a rate of 1500 kg/s and falls 75 m. How many 60-W…

A: Given: The rate of fall of water is 1500 kg/s. The height of the fall is 75 m. The power of the bulb…

Q: Assume you have one room it has 8 lamps and they are working 11 hours per day. If the unit price is…

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Q: Initially, the switch is open, and all light bulbs are on. All light bulbs are identical. Which…

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Q: A lightbulb is connected to a battery and glows. Does more current flow into the bulb or out of the…

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Q: If you Christmas tree lights or any lights in a string all go out when one bulb blows out, what type…

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Q: A certain solar cell type has an output capability of 7.6 A at 0.4 V. A series / parallel solar…

A: Voltage of each cell = 0.4 V Number of cells in series= 242

Q: A certain solar cell type has an output capability of 0.9 A at 0.6 V. A series / parallel solar…

A: Each solar cell has a capability of 0.9 A and 0.6 V Total number of parallel strings is 144 And each…

Q: The diagram below shows a battery and three light bulbs that are connected to an electric wire it…

A: If one of the bulbs is removed then the remaining bulbs will get  brighter. This is because the…

Q: Why are all compact fluorescent lamps more efficient than incandescent lamps?

A: All compact fluorescent lamps more efficient than incandescent lamps because of the following…

Q: Assume you have one room it has 8 lamps and they are working 11 hours per day. If the unit price is…

A: Solution: Given that working hours = 11 hours working days = 20 days number of lamps = 8

Q: Compare of Incandescent, CFL, and LED Light Bulbs?

A: Introduction: Incandescent light bulbs: It is the most common type of bulb and the simplest form of…

Q: What types of bulbs are good in the Bathroom Area? a. incandescent bulbs b. fluorescent c. LED…

A: Option (b) is correct  Fluorescent bulbs

Q: A B D + 1. Bulb B will glow more brightly than A. Bulb D will glow the brightest than A and B. Bulb…

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Q: What types of bulbs are good in the bedroom? a. incandescent bulbs b. fluorescent c. LED light…

A: An incandescent lamp generates light when electric current heats a tungsten filament wire so that it…

Q: 8) (5 pts) In the following figure, what will happen to the brightness of bulbs A and B if C is…

A: Solution of above question given in below step. option A is RIGHT

Q: A high intensity desk lamp is rated 28 W but requires on 11 V. It has a transformer which converts…

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Q: What is the difference between incandescent bulbs, fluorescent and LED light bulbs?

A: To differentiate between between incandescent bulbs, fluorescent and LED light bulbs.

Q: The average television is said to be on 6 hours per day. Estimate the yearly cost of electricity to…

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Q: Quickly spinning the handle of a hand generator, Kevan is able to light three bulbs in a circuit.…

A: Answer The batteries do not make the charges move as much

Q: Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?

A: The electric toaster and electric irons are made up of alloy rather than pure metal because the…

Q: Passive devices such as resistors suffer from instability and variability.

A: The value of resistance is not fix. It value changes with change of temperature and dimension of…

Q: Which of the bulb configurations resulted in the least current through each bulb and why?

A: Given data:  In configuration A Bulb are connected in series combination In configuration B Bulb are…

Q: a string of lights consists of 50 LED bulbs connected in a series. the resistance of each bulb is…

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Q: A battery is connected first across one bulb and then across two bulbs in series. If all the bulbs…

A: Given data:  Battery connected first across one bulb Then across series combination of two bulbs All…

Q: two light bulbs have cylindrical filaments much greater in length than in diameter. the evacuated…

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Q: Only a small percentage of the electric energy fed into a common lightbulb is transformed into…

A: Given: The small percentage of the electric energy fed into a common lightbulb is transformed into…

Q: Are automobile headlights wired in parallel or in series? What is your evidence?

A: When a connection is wired in parallel, if one burns out the other remains while when it is in…

Q: A current of 0.3 A is passed through a lamp for 2 minutes using a 6-V power supply. The energy (in…

A: Given : Current through the lamp, I = 0.3 A Supply voltage, V = 6 V Time, t = 2 min = 120 s

Q: It seems hard to justify spending $4.00 for an LED lightbulb when an ordinary incandescent bulb…

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Q: Over time, atoms “boil off” the hot filament in an incandescent bulb and the filament becomes…

A: The quantity that provides an obstruction to the path of current is called resistance. The…

Q: An electric dryer consumes 6.0 x 106 joules of energy when operating at 220 volts for 30 minutes.…

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Q: How much charge flows through a lamp in 2.0 minutes if it carries a steady current of 0.30A?

A: Given data: Time (t) = 2.0 minutes Current (I) = 0.30 A Required: Amount of flow of Charge (q)

Q: In a flashlight, the current is 0.40 A and the voltage is 3 V. Find the electrical energy dissipated…

A: Given Data : The current in the flashlight is given as I = 0.40 A. The voltage in the flashlight is…

Q: A car stereo pools 2.89 A from a car's battery. If the battery has a voltage of 12 V, how much power…

A: Given data Current (I) = 2.89 A Voltage (V) = 12 V How much power does it use =? According to ohms…

Q: In a flashlight, the current is 0.40 A and the voltage is 3 V. Find the electrical energy dissipated…

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Q: In a certain stereo system, each speaker has a resistance of 5.00 Ω. The system is rated at 55.2 W…

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Q: If the cost is 144.77 c/kWh compare how much would it cost to run LED and Incandescent lights for 10…

A: The energy consumed can be expressed as E=Pt

Q: An ordinary flashlight uses two D-cell 1.5-V batteries connected in series to provide 3.0 V across…

A: Current through Bulb= 380mA Total Potential difference= 3 Volts

Q: Compare between incandescent lamps (70 watt) and CFL lamp (17 watt). if the price of incandescent is…

A: We know that the energy which is consumed in using the incandescent lamp is given as shown below.…

Q: When you are using a fluorescent lamp energy is converted into energy O Mechanical; Light O…

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Q: A short circuit in a 120 V appliance cord has a 0.35 Ω resistance.  Calculate the temperature rise…

A: To calculate the temperature we calculate first the electrical energy generated. Mathematically this…