The electrical disc is connected to a 230 V mains voltage and through it a 9.5 A current is passed.

[Student_needs_help]

Hello, first i want to thank you, you really help me alot last time.

Now i have this 2 problem.

The electrical disc is connected to a 230 V mains voltage and through it a 9.5 A current is passed. How long
can it be used for 9 euros? Suppose that electricity costs 10 cents / kWh.

When the computer is connected to 230 V, a 0.9 A current passes through it. How much is it
use for 1 hour? Suppose that electricity costs 10 cents / kWh.

 

[Student_needs_help]

Sorry i accidentally press the button solved.

 

[Deleted member 4993]

Hello, first i want to thank you, you really help me alot last time.

Now i have this 2 problem.

The electrical disc is connected to a 230 V mains voltage and through it a 9.5 A current is passed. How long
can it be used for 9 euros? Suppose that electricity costs 10 cents / kWh.



When the computer is connected to 230 V, a 0.9 A current passes through it. How much is it
use for 1 hour? Suppose that electricity costs 10 cents / kWh.

For # 1

Hint:

How many Kwh can by with 9 euros?....................(1)

How many Kw is used by the disc? .......................(2)

Divide (1) by (2) and get the time of use.

 

[Student_needs_help]

Thanks i got it done ?