Question

1 billion electrons pass from point P towards another point Q in one mini second. What is the current and what is it's direction?

Answer 1

Answer:

n=number of electrons=10 million=10^7

t=time taken=1 micro second=10^(-6) second

its direction is from Q to Point P

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Answer 2

Given,

n = 1 billion = 1,000,000,000

e = 1.6 * 10^-19 C

t = 1 milisec

to find I , apply formula

I = Q/t

where,

Q = ne

So,

I = 1000000000 * 1.6*10^-19/ 10^-3

I = 1.6 *10^-7A

Direction of current is opposite to direction of flow of e-

or

from positive to negative terminal.

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