Question

An electron gun fires 2000 electrons in 4 sec. Calculate the charge and electric current constituted by it. ​

Answer 1

Answer:

Charge= 3.2×10^-16 C

Current=8×10^-17 A

Explanation:

Total charge = 2000×1.6×10^-19

= 3.2×10^-16 C

current =charge÷time

= 3.2×10^-16÷4

=8×10^-17 A

1.6×10^-19 is charge of a single electron

Answer 2

Answer:

Charge=3.2×10^(-19)C,

Current=8×10^(-17)A.

Explanation:

No. of electrons=2000e-

T=4s.

Now,

Q=ne

So, Q= 2000 ×1.6×10^(19)

So, Q=3.2×10^(-16) C

So, Electric Current=3.2×10^(-16) C

Now,

Electric Charge = Current ×Time

So, Current= Q/T

So, Current=3.2×10^(-16)/4

So, Current=8×10^(-17)A