How can you tell that this iron operates using the mains supply?

  • Thread starter chessie273
  • Start date
  • #1
Hi, i'm new to the forum so i don't really quite know what i'm doing yet!

anyway, i know this question is REALLY basic but physics is not my forte and i'm confused...

"John has just bought a new iron and sees this plate on the handle -
230V
1840W
50Hz"

John irons a shirt for 10s

energy transformed = power x time

so if i'm correct:
time = 10s
power= 1840W
energy transformed = 18400J

the final question "John can tell from the plate that the iron can operate using mains supply. How can he tell this?"

and i have absolutely no idea!

help would be greatly appreciated - i really need to understand this, its from a gcse mock paper and my exam is in a couple of weeks!
 
Last edited:

Answers and Replies

  • #2
chroot
Staff Emeritus
Science Advisor
Gold Member
10,226
34
I don't actually see any question. Where did the 10 seconds come from?

You should post the question exactly as it was given to you.

- Warren
 

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