How many electrons pass through a lamp in 3 minutes.If the current is 300 ma?
300 mA = 0.300 Amps.
1 Amp = 6.241*10^18 electrons/s.
0.300 Amps = 1.872*10^18 electrons/s.
1.872*10^18e/s. * 180s = 3.37*10^20 Electrons pass through in 3 minutes.
To determine the number of electrons that pass through a lamp in 3 minutes, we need to use the formula:
Number of electrons = Current (in Amperes) × Time (in seconds) ÷ Charge of an electron
First, let's convert the current from milliamperes (mA) to Amperes (A):
300 mA = 300 × 10^(-3) A = 0.3 A
Next, we need to convert the time from minutes to seconds:
3 minutes = 3 × 60 seconds = 180 seconds
Now, we need to determine the charge of an electron. The charge of an electron is approximately 1.6 × 10^(-19) Coulombs.
Plugging all the values into the formula:
Number of electrons = 0.3 A × 180 s ÷ (1.6 × 10^(-19) C)
Calculating this expression:
Number of electrons ≈ 0.3 × 180 ÷ 1.6 × 10^(-19)
Doing the math:
Number of electrons ≈ 3.375 × 10^(20)
Therefore, approximately 3.375 × 10^(20) electrons pass through the lamp in 3 minutes.