Question

When my phone is plugged into a 120 Volt outlet, it takes 20 minutes to fully charge it with 32kJ of energy.
How much current if flowing through the charging cord?
A) 0.13 Amps
B) 0.22 Amps
C) 0.33 Amps
D) 0.64 Amps
E) 13 Amps
F) 22 Amps
G) 33 Amps
H) 64 Amps

There is only one answer, please help!​

Answer 1

The Current flowing in the charger is 0.22 Amps.

Energy consumed

The energy consumed by the phone is calculated using the following relationship.

E = IVt

where;

• I is the current flowing
• V is the voltage
• t is the time

Current flowing in the charger

The Current flowing in the charger is calculated as follows;

$I = \frac{E}{Vt} \\\\I = \frac{32,000}{120 \times (20 \times 60 )} \\\\I = 0.22 \ Amps$

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