Question

a current 4A flows through an automobile headlight. How many electrons flow through the headlight in a time 4 hours.( e= 1.6 × 10 ^-19)​

Answer 1

Answer:

No. of Free Electrons ( n ) = 36 × 10²²

Explanation:

★ CURRENT ELECTRICITY ★

★ GIVEN ;

» Current ( i ) = 4 Ampere

» Charge ( Q ) = 1.6 × 10^-19

» Time ( T ) = 4 hours ≈ 240 mins.

★ NO. OF FREE ELECTRONS THROUGH HEADLIGHT ( n ) = ???

______ [ BY USING FORMULA ] _____

[ $Current \: ( \: i \: ) \: = \: \frac{No. \: of \: free \: Electrons \: ( \: n \: ) \: \times \: Charge \: ( \: q \: )}{Time \: ( \: t \: )}$ ]

★ n = [ i × T ] / Q

» n = [ 4 × 240 min. ] / 1.6 × 10^-19

» n = [ 4 × 240 × 60 ( seconds ) ] /1.6 × 10^-19

» n = [ 4 × 14,400 ] / 1.6 × 10^-19

» n = [ 57,600 ] / 1.6 × 10^-19

» n = 36,000 × 10^19

★ » n = 36 × 10²² Electrons « ★

_________________________________________

ANSWER :- HEADLIGHT HAVING CURRENT 4 AMPERE HAS , NO. OF FREE ELECTRONS IS ;

★ No. of Free Electrons ( n )= 36 × 10²²★

Answer 2

Answer:1.8 x 10²³

Explanation:

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