28 March, 16:22

A cell phone charger uses 5.6 Joules of energy per second when plugged

into an outlet but only 1.7 Joules of energy per second actually end up in

the cell phone battery. What is the efficiency of the charger?

1.) 30%

2.) 3.29%

3.) 329%

4.) 9.59%

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A cell phone charger uses 5.6 Joules of energy per second when pluggedinto an outlet but only 1.7 Joules of energy per second actually end up inthe cell phone battery. What is the efficiency of the charger?1.) 30%2.) 3.29%3.) 329%4.) 9.59%

A cell phone charger uses 5.6 Joules of energy per second when plugged

into an outlet but only 1.7 Joules of energy per second actually end up in

the cell phone battery. What is the efficiency of the charger?

1.) 30%

2.) 3.29%

3.) 329%

4.) 9.59%