If ∆U and ∆W represent the increase in internal energy and work done by the system

⇦

⇨

If ∆U and ∆W represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true?

Options

(a) ∆U = – ∆W, in an adiabatic process
(b) ∆U = ∆W, in an isothermal process
(c) ∆U = ∆W, in an adiabatic process
(d) ∆U = – ∆W, in an isothermal process

Correct Answer:

∆U = – ∆W, in an adiabatic process

Explanation:

BY first law of thermodynamics, ∆Q = ∆U + ∆W
In adiabatic process, ∆Q = 0 ∆U = – ∆W
In isothermal process, ∆U = 0 ∆Q = ∆W

Related Questions:

1. If alternating source of primary coil on transformer is replaced by a Laclanche cell
2. A milli ammeter of range 10 mA has a coil of resistance 1 ohm
3. A small signal voltage V(t)=V₀ sin ωt is applied across an ideal capacitor C
4. The 6563 Å line emitted by hydrogen atom in a star is found to be red shifted by 5Å
5. If 20% of a radiactive element decays in 10 days, then amount of original material left

Topics: Thermodynamics (179)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends