A potential difference of $400$ volt is maintained across a conductor of resistance $200 o h m$ . Calculate the number of electrons flowing through it in one second. Charge on electron, $e = 1.6 \times 10^{- 19} C$

Open in App

Solution

Potential difference = 400V
Resistance = 200 $Ω$
Current $\frac{V}{R}$
$= \frac{400}{200}$
= 2A
Current = $\frac{c h a r g e f l o w n}{t i m e t a k e n}$
2C = charge
$1 C = \frac{10^{19}}{1.6} e$
$2 C = (\frac{10^{19}}{1.6} \times 2) e l e c t r o n s$
$\frac{1}{8} \times 10^{20}$ electrons
$= 10^{17} \times 150 = 1.5 \times 10^{19} e l e c t r o n s$

Suggest Corrections

Similar questions

Q. If current of one ampere flows through a conductor, the number of electrons flowing across the cross section of the conductor in 2 seconds is _____(Take the charge on an electron equal to 1.6 x

10^{- 19} C

)

Q. If one ampere of current flows through a conductor, then the number of electrons flowing across any cross-section of the conductor in 4 seconds is:
Charge on each electron is

1.6 \times 10^{- 19} C

Q. A current of

5 A

flows through a conductor. Calculate the number of electrons flowing through the conductor in

2 s .

[Take charge of electron as

1.6 \times 10^{- 19}

Q. The potential difference across a resistor of resistance

10 Ω

, if

10^{20}

electrons flow through it in one second is:

The potential difference applied to an X-ray tube is 5 kV and the current flowing through it is 3.2 mA. Then what is the number of electrons striking the target per second? [The charge of one electron is $e = - 1.6 \times 10^{- 19} C$ ]

Join BYJU'S Learning Program

A potential difference of 400 volt is maintained across a conductor of resistance 200 ohm. Calculate the number of electrons flowing through it in one second. Charge on electron, e=1.6×10−19C

Potential difference = 400VResistance = 200ΩCurrent VR=400200= 2ACurrent = chargeflowntimetaken2C = charge 1C=10191.6e2C=(10191.6×2)electrons18×1020 electrons =1017×150=1.5×1019electrons

A potential difference of $400$ volt is maintained across a conductor of resistance $200 o h m$ . Calculate the number of electrons flowing through it in one second. Charge on electron, $e = 1.6 \times 10^{- 19} C$