Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

please explain the sign conventions regarding work done in the 1st law expression in detail.please include p-v graphs and sign convention related to this in the discussion.i am really confused about this.thank you very much!

please explain the sign conventions regarding work done in the 1st law expression in detail.please include p-v graphs and sign convention related to this in the discussion.i am really confused about this.thank you very much!

Grade:11

1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

Dear tushar

If the work is done by system then it is positive and if work is done on the system them work done will be negative

 

6554-1313_7662_untitled 1.JPG

lets discuss with carnot cycle.

in compression process work is done on the system so work done will be negative.(4-1)

in expansion process work is done by the system so it will be positive.(2-3)

lets find the magnitude of work done

We =+Cv(T2-T3)

it will be positive

and

Wc = -Cv(T1-T2)  we have taken - sign becouse work done is negative


Please feel free to post as many doubts on our discussion forum as you can.
 If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
 We are all IITians and here to help you in your IIT JEE  & AIEEE preparation.

 All the best.
 
Regards,
Askiitians Experts
Badiuddin

 

 

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free