# In case of power failure, a battery is used to light a bulb, run a fan heat an electric iron(each of 100 W rating) for 10 minutes. In this process the work done and heat supplied by the battery are given by:

1.  W = 0, Q = 0

2.  W = 180 kJ, Q = 0

3.  W = 60 kJ, Q = 120 kJ

4.  None of these

4

W = 180 kJ, Q = 0

Explanation :
No Explanation available for this question

# The characteristics(s) of a control volume is (are)

1.  Volume, shape and position with respect to an observer are fixed

2.  Volume, shape and position with respect to an observe may change

3.  There is no material flow across the boundary

4.  There is no material flow across the boundary

5.  Both (a) and (c)

5

Both (a) and (c)

Explanation :
No Explanation available for this question

# A body of weight 100 N falls freely through a distance of 10 m against an atmospheric drag force of 5 N. Considering the body as the system, the work interactions is

1.  1000 Nm

2.  1050 Nm

3.  950 Nm

4.  50Nm

4

50Nm

Explanation :
No Explanation available for this question

# An insulated rigid vessel contains some gas and a electrical resistor. In a certain interval of time the resistor connected to an external electric power source heats the gas. Considering the vessel and its contents as the system

1.  Heat and work transfers zero

2.  Heat and work transfers zero

3.  Heat transfer is zero and work transfer is negative

4.  Heat transfer is positive and work transfer is zero

4

Heat transfer is zero and work transfer is negative

Explanation :
No Explanation available for this question

# In a reversible isothermal process undergone by an ideal gas,

1.  Heat transfer is zero

2.  Change in internal Energy is zero

3.  Work transfer is zero

4.   Heat transfer is equal to work transfer

5.  Both (b) and (d)

5

Both (b) and (d)

Explanation :
No Explanation available for this question

# A system undergoes a change of state during which 100 Kj of heat is transferred to it and it does 50 original state through a process during which 120 kJ of heat is transferred to it. The work done by the system is

1.  50 kJ

2.  70 kJ

3.  170 kJ

4.  None of these

4

170 kJ

Explanation :
No Explanation available for this question

# For reversible adiabatic compression in a steady flow process, the work transfer per unit mass is

1.  ∫p dV

2.  ∫V dp

3.  ∫T dS

4.  ∫S dT

4

∫V dp

Explanation :
No Explanation available for this question

# Match List-I wish List –II List-1 List-2 Heat to work 1.Nozzle Heat to lift weight reaction 2.Endothermic chemical Heat to strain energy 3.Heat engine Heat to electromagnetic evaporation 4.Hot air ballon 5.Thermal radiation 6.Bimetallic strips codes are given bellow

1.  3 ,2,4,1

2.  4,3 ,5,2

3.  6,5,6 ,1

4.  1,2 ,3 ,6

4

3 ,2,4,1

Explanation :
No Explanation available for this question

# The volume V versus temperature T graphs for a certain amount of a perfect gas at two pressure p1 and p2 are shown in the figure. It can be concluded that

1.  P1 represents monatomic gas and p2 represents diatomic gas

2.  The adiabatic index for p1 is higher than that for p2

3.  The pressure p1 is greater than the pressure p2

4.  None of the above

4

The pressure p1 is greater than the pressure p2

Explanation :
No Explanation available for this question

1.  23.97 bar

2.  25.00 bar

3.  26.03 bar

4.  34.84 bar

4