SELECT * FROM question_mgmt as q WHERE id=1800 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=58 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?

Answer:

I = 0.5 A

t = 2 hours = 2 × 60 × 60 s = 7200 s

Thus, Q = It

= 0.5 A × 7200 s

= 3600 C

We know that 96487C = 6.023 X 1023 number of electrons.

Then,

Hence, 2.25 X 1022number of electrons will flow through the wire.


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