Question

A circuit draws 4×10 to the power 15electuons per minute from battery
of 7v.Calculate the work done in 2 minutes ?​

Answer 1

$\underline{ \mathfrak{\huge{\boxed{\fcolorbox{purple}{orange}{\purple{Answer\::-}}}}}} \\ \\ \star \rm \: \blue{Given} \\ \\ \implies \rm \: no. \: of \: electrons = 4 \times {10}^{15} \\ \\ \implies \rm \: time = 2 \: min = 120 \: s \\ \\ \implies \rm \: emf \: of \: battery = 7 \: v \\ \\ \star \rm \: \blue{To \: Find} \\ \\ \implies \rm \: work \: done... \\ \\ \star \rm \: \blue{Formula} \\ \\ \implies \rm \: \pink{work \: done = q \times V} \\ \\ \star \rm \: \blue{Calculation} \\ \\ \implies \rm \: q = ne = 4 \times {10}^{15} \times 1.6 \times {10}^{ - 19} \\ \\ \therefore \rm \: q = 6.4 \times {10}^{ - 4} \: C \\ \\ \implies \rm \: W = qV = 6.4 \times {10}^{ - 4} \times 7 \\ \\ \therefore \: \underline{ \boxed{ \bold{ \rm{ \orange{W = 4.48 \times {10}^{ - 3} \: J}}}}} \: \star$