Question

how do we Express electric current a current of 750 milliampere is drawn by a filament of a bulb for 9 minutes find the amount ofamount of electrical charge that flows through the circuit ​

Answer 1

Given,

Current drawn , I = 750 milli A.

                           = $750*10^{-3} A$

time t, = 9 minutes

           = 9 *60 seconds = 540 seconds.

Now,

We know ,

Amount of electric charge flow through the circuit , q = Current* time

                                                                                                                =

   = $750*10^{-3}*540$

    = 405 C

Answer 2

Welcome to the world of electrodynamics physics.

Given:-

Current = 750mA

Convert it in to SI unit =

$750 \times {10}^{ - 3}$

Time for which current flow = 9 minutes .

= 9× 60 = 540seconds

Now, According to definition :-

Current :- The rate of flow of charge through a cross - section of a conductor is called electric current.

I. e,

$\large</strong><strong>\</strong><strong>r</strong><strong>e</strong><strong>d</strong><strong>{\underline{\boxed{</strong><strong>i = \frac{q}{t} </strong><strong>}}}$

also, Q = I * T

put the value,

$\implies$ $q = 750 \times {10}^{ - 3} \times </strong><strong>5</strong><strong>4</strong><strong>0</strong><strong>$

$\implies$ $q = 75 \times </strong><strong>5</strong><strong>4</strong><strong> \times {10}^{ - 2} \times 10$

$\implies$ $q = </strong><strong>4</strong><strong>0</strong><strong>5</strong><strong>c$

hence, the charge flow through the filament in 9 minutes is 405 C.