Back

38. A film of water is formed between two straight parallel wires of length 10cm each separated by 0.5 cm. If their separation is increased by 1 mm while still maintaining their parallelism,

how much work will have to be done (Surface tension of water =7.2 x10-2 N/m)

(a) 7.2 x 10-6 Joule                  (b) 1.44 x 10-5 Joule

(c) 2.88 x 10-5 Joule               (d) 5.76 x 10-5 Joule

Ans. b

(13)

5/5 - (3 votes)

Related Posts:

Powered by Contextual Related Posts

Tag:

Ajneesh

You may also like

12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is
05/09/2022

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

11. The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from A → B → C is 50 J and 20 cal heat is given to the system. The change in internal energy between A and C is
05/09/2022

(a)      34 J (b)  70 J (c)   84 J (d)  134 J Answer-d (202)

error: Content is protected !!
Call Now Button