NEET Physics: Questions 1426  1430 of 2142
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Question number: 1426
» Thermodynamics » Thermal Equilibrium
Question
For an isothermal expansion of a perfect gas, the value of is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1427
» Properties of Solids & Liquids » Elastic Behavior
Question
A wire of cross sectional area 3 mm ^{2} is just stretched between two fixed points at a temperature of 20° C. Determine the tension when the temperature falls to 20° C. Coefficient of linear expansion a = 10 ^{5} °C ^{1} and Y = 2 × 10 ^{11} N/m ^{2}.
Choices
Choice (4)  Response  

a.  120 N 

b.  102 N 

c.  20 N 

d.  120 KN 

Question number: 1428
» Properties of Solids & Liquids » Surface Energy and Surface Tension
Question
The radii of two soap bubbles are r _{1 } and r _{2}. In isothermal conditions, two meet together in vacuum. Then the radius R of the resultant bubble is given by
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1429
» Atoms and Nuclei » Bohr Model
Question
As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is
Choices
Choice (4)  Response  

a.  122.4 

b.  40.8 

c.  1.51 

d.  13.6 

Question number: 1430
» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics
Question
One mole of an ideal monatomic gas is taken from A to C along the path ABC. The temperature of the gas at A is T _{0}. For the process ABC –
(1) Work done by the gas is
(2) Change in internal energy of the gas is
(3) Heat absorbed by the gas is
(4) Heat absorbed by the gas is
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  2 and 4 are correct 

b.  1 and 2 ate correct 

c.  1, 2 and 3 are correct 

d.  1 and 3 are correct 
