A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

Question

A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

Answer 1

100 = V i

so i = 100watts/110 volts=about 1 coulomb/second (you use calculator)
e = 1.6*10^-19 coulomb
so
(1/1.6)*10^19 electrons/second

so 800 hours = 800*3600 seconds
= 8*3.6*10^5 seconds

so
(8*3.6/1.6)* 10^24 electrons (quite a few)

Answer 2

Well, I'm no electrician, but I do have a quick joke for you: Why don't scientists trust atoms? Because they make up everything! Now, onto your question.

To calculate the number of electrons that move through the bulb, we need to know the current flowing through it. Typically, the current is measured in amperes (A). However, with the given information (power and lifetime), we don't have enough information to determine the current or the number of electrons.

But hey, don't worry! I'm here to bring a smile to your face, even if I can't solve this electrical mystery.

Answer 3

To calculate the number of electrons that move through the bulb in its lifetime, we need to use the formula:

Number of electrons = Power × Time / Charge of an electron

Here are the given values:
Power = 100 watts
Time = 800 hours
Charge of an electron = 1.6 × 10^-19 coulombs

Let's substitute these values into the formula:

Number of electrons = (100 watts × 800 hours) / (1.6 × 10^-19 coulombs)

Now, let's calculate it step by step:

1) Convert hours to seconds because the charge unit is in coulombs:
Time in seconds = 800 hours × 3600 seconds/hour

2) Perform the calculation for the number of electrons:
Number of electrons = (100 watts × Time in seconds) / (1.6 × 10^-19 coulombs)

Now, let's plug in the values and calculate the result:

Answer 4

To calculate the number of electrons that move through the light bulb in its lifetime, we need to use some basic physics principles.

First, let's find the total energy consumed by the light bulb over its lifetime. The power of the light bulb is given as 100 Watts, and the average lifetime is given as 800 hours. We can use the formula:

Energy = Power x Time

Energy = 100 W x 800 h = 80,000 Watt-hours

Next, we need to convert the energy consumed into the number of electrons. We know that 1 electron-volt (eV) is equal to 1.6 x 10^-19 Joules.

To convert the energy consumed in Watt-hours to electron-volts, we can use the following formulas:

1 electron-volt = 1.6 x 10^-19 Joule
1 Joule = 1 Watt x 1 second

First, convert the energy from Watt-hours to Joules:

1 Watt-hour = 3600 Joules

Energy (Joules) = 80,000 W-h x 3600 J/W-h = 288,000,000 Joules

Now, convert the energy from Joules to electron-volts:

Energy (eV) = Energy (Joules) / (1.6 x 10^-19 J/eV)

Energy (eV) = 288,000,000 J / (1.6 x 10^-19 J/eV) = 1.8 x 10^27 electron-volts.

Finally, to find the number of electrons, we divide the energy in electron-volts by the charge of an electron, which is approximately 1.6 x 10^-19 Coulombs.

Number of electrons = Energy (eV) / (1.6 x 10^-19 C)

Number of electrons = (1.8 x 10^27 eV) / (1.6 x 10^-19 C) ≈ 1.1 x 10^46 electrons

Therefore, approximately 1.1 x 10^46 electrons move through the light bulb during its lifetime.