मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

Consider the Process on a System Shown in Figure. During the Process, the Work Done by the System - Physics

Advertisements
Advertisements

प्रश्न

Consider the process on a system shown in figure. During the process, the work done by the system ______________ .

पर्याय

  • continuously increases

  • continuously decreases

  • first increases then decreases

  • first decreases then increases

MCQ
रिकाम्या जागा भरा

उत्तर

continuously increases

 

Work done by a system, `W=intPdV`

Here,

P = Pressure on the system

dV = change in volume.

Since dV is positive, i.e. the volume is continuously increasing, work done by the system also continuously increases.

shaalaa.com
Heat, Internal Energy and Work
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Laws of Thermodynamics - MCQ [पृष्ठ ६१]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 4 Laws of Thermodynamics
MCQ | Q 5 | पृष्ठ ६१

संबंधित प्रश्‍न

In changing the state of a gas adiabatically from an equilibrium state to another equilibrium state B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state to via a process in which the net heat absorbed by the system is 9.35 cal, how much is the net work done by the system in the latter case? (Take 1 cal = 4.19 J)


Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following:

Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface?


A steam engine delivers 5.4×10J of work per minute and services 3.6 × 10J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?


A force F is applied on a block of mass M. The block is displaced through a distance d in the direction of the force. What is the work done by the force on the block? Does the internal energy change because of this work?


The outer surface of a cylinder containing a gas is rubbed vigorously by a polishing machine. The cylinder and its gas become warm. Is the energy transferred to the gas heat or work?


When we rub our hands they become warm. Have we supplied heat to the hands?


When a tyre bursts, the air coming out is cooler than the surrounding air. Explain.


Consider two processes on a system as shown in figure.

The volumes in the initial states are the same in the two processes and the volumes in the final states are also the same. Let ∆W1 and ∆W2 be the work done by the system in the processes A and B respectively.


A gas is taken along the path AB as shown in figure. If 70 cal of heat is extracted from the gas in the process, calculate the change in the internal energy of the system.


A gas is initially at a pressure of 100 kPa and its volume is 2.0 m3. Its pressure is kept constant and the volume is changed from 2.0 m3 to 2.5 m3. Its Volume is now kept constant and the pressure is increased from 100 kPa to 200 kPa. The gas is brought back to its initial state, the pressure varying linearly with its volume. (a) Whether the heat is supplied to or extracted from the gas in the complete cycle? (b) How much heat was supplied or extracted?


What is the energy associated with the random, disordered motion of the molecules of a system called as?


A system releases 100 kJ of heat while 80 kJ of work is done on the system. Calculate the change in internal energy.


When 1 g of water at 0° C and 1 x 105 N/m2 pressure is converted into ice of volume 1.082 cm3, the external work done will be ____________.


Which of the following represents isothermal process?


In insulated systems, the amount of external work done by the gas is proportional to: 


If a gas is compressed adiabatically:


The internal energy of one mole of argon at 300 K is ______. (R = 8.314 J/mol.K)


Explain the change in internal energy of a thermodynamic system (the gas) by heating it.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×