Question

An operating television set draws 0.71 ampere of current when connected to a 120-volt outlet. Calculate the time it takes the television to consume 3.0 x 105 joules of electronic energy. [Show all work, including the equation and substitution with units.]

Answer 1

Answer:

It will take 10559.44 sec to consume energy

Explanation:

It is given current i = 0.71 A

Voltage V = 120 volt

According to ohm's law resistance will be $R=\frac{V}{i}$

$R=\frac{120}{0.71}=169.01ohm$

Energy consumed by the television is $E=3\times 10^5J$

Energy consumed is given by $E=i^2Rt$

$3\times 10^5=0.71^2\times 169.01\times t$

t = 10559.44 sec

So it will take 10559.44 sec to consume energy