A current of 5mA is passing through a wire. How many electrons are pas

1.	A current of 5mA is passing through a wire. How many electrons are passing per minute through any cross section of the wire?
Answer» Answer: No.of Free ELECTRONS ( n ) = 18.75 ×10^17 ê Explanation: ★ CURRENT ELECTRICITY ★ GIVEN ; » CURRENT ( i ) = 5 mA » Time ( t ) = 1 minute = 60 sec. » Electric CHARGE ( e ) = 1.6 × 10^-19 C ★ No. of Free Electrons ( n ) = ??? *___ [ BY USING FORMULA ] ________* [ $i \: = \frac{ \: n \: \times \: e }{t}$ ] ★ no. of free* electrons ( n ) =[CURRENT ( i ) × TIME ( t ) ] / ELECTRIC CHARGE (e)* » n = [ 5 × 10-³ × 60 ] / 1.6 × 10^-19 » n = [ 300 × 10-³ ] × 6.25 × 10^18 » n = [ 0.3 ] × 0.625 × 10^19 » n = 0.1875 × 10^19 ★ → n = 18.75 × 10^17 ê ← ★ _________________________________________ ANSWER :- HENCE ; NO. OF FREE ELECTRONS passing through 5mA current in 1 minute is ; *♣ n = 18.75 × 10^17* ë ♥

A current of 5mA is passing through a wire. How many electrons are passing per minute through any cross section of the wire?

Answer»

Answer:

No.of Free ELECTRONS ( n ) =

18.75 ×10^17 ê

Explanation:

★ CURRENT ELECTRICITY ★

GIVEN ;

» CURRENT ( i ) = 5 mA

» Time ( t ) = 1 minute = 60 sec.

» Electric CHARGE ( e ) = 1.6 × 10^-19 C

★ No. of Free Electrons ( n ) = ???

___ [ BY USING FORMULA ] ________

[ $i \: = \frac{ \: n \: \times \: e }{t}$ ]

★ no. of free electrons ( n ) =[CURRENT ( i ) × TIME ( t ) ] / ELECTRIC CHARGE (e)

» n = [ 5 × 10-³ × 60 ] / 1.6 × 10^-19

» n = [ 300 × 10-³ ] × 6.25 × 10^18

» n = [ 0.3 ] × 0.625 × 10^19

» n = 0.1875 × 10^19

★ → n = 18.75 × 10^17 ê ← ★

_________________________________________

ANSWER :- HENCE ; NO. OF FREE ELECTRONS passing through 5mA current in 1 minute is ;

♣ n = 18.75 × 10^17 ë ♥