Question

What power in Kw is required to transfer a charge of 9000 coulomb through a potential difference of 220 volts in 45 min?

0.9 kW

0.73 kW

0.5 kW

1.6 kW

Answer 1

The power is 0.73 kW.

(B) option is correct.

Step-by-step explanation:

Given that,

Charge = 9000 C

Potential difference = 220 V

Time = 45 min

We need to calculate the energy required to transfer charge Q through V

Using formula of energy

`E =QV`

Put the value into the formula

`E=9000*220`

`E=1980000\ J`

We need to calculate the power

Using formula of power

`P=(1980000)/(45*60)`

`P=733.33\ W`

`P=0.73\ kW`

Hence, The power is 0.73 kW.