Question

The electric motor in the car is powered by a battery.

To charge the battery, the car is plugged into the mains supply at 230 V

The power used to charge the battery is 6.9 kW

Calculate the current used to charge the battery.

Answer 1

The current used to charge the battery is 30 Amps.

Step-by-step explanation:

To calculate the current used to charge the battery, we can use the equation P = IV, where P is the power, I is the current, and V is the voltage. Rearranging the equation, we have I = P/V. Plugging in the given values, I = 6.9 kW / 230 V = 30 A. Therefore, the current used to charge the battery is 30 Amps.

Answer 2

I = 30 A.

Step-by-step explanation:

Given that,

The voltage of the battery, V = 230 V

Power used to charge the battery, P = 6.9 kW

We need to find the current used to charge the battery. The formula for the power is given by :

P = VI

Where

I is current

So,

So, the required current is 30 A.