Question

If 500 electrons cross the filament of an electric bulb in 10 seconds , when a 20 Volt battery is connected . Calculate the current flowing through this electric bulb. ​

Answer 1

Answer:

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Explanation:

Given: an electric bulb

To find the number of electrons flowing through an electric bulb every second, if the current that passes through the bulbs is 1.6A

Solution:

Use the relation,

I=

t

Q

=

t

ne

, where n =number of electrons and e = charge on 1 electron and t = time

Using thevallues given in the question we can write,

1.6A=

1sec

n×e

⟹n=

1.6×10

−19

1.6

[∵ charge on 1 electron = 1.6×10

−19

C]

n=10

19

are the required number of electrons.