Thermodynamics (NEET Physics): Questions 80 - 83 of 84

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Question number: 80

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

Assertion-Reason▾

Assertion (Ꭺ)

In isothermal process whole heat energy supplied to the body is converted into inter energy.

Reason (Ꭱ)

According to the first law of thermodynamics, Q=U+PV

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are false
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 81

» Thermodynamics » Concept of Temperature

MCQ▾

Question

Six moles of an ideal gas performs a cycle shown in figure. If the temperature T A = 600K, T B = 800 K, T C = 2200K and T D = 1200. K, the work done per

System of ideal gas Temperature at A, B, C and D

System of Ideal Gas Temperature at a, B, C and D

In above figure we show six moles of an ideal gas performs a cycle.

Choices

Choice (4) Response
a.

60 KJ

b.

40 kJ

c.

20 kJ

d.

30 kJ

Question number: 82

» Thermodynamics » Concept of Temperature

MCQ▾

Question

A Carnot engine whose low temperature reservoir is at 17 C has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how. many degrees should the temperature of the high temperature reservoir be increased

Choices

Choice (4) Response
a.

280 K

b.

560 K

c.

840K

d.

380K

Question number: 83

» Thermodynamics » Concept of Temperature

Appeared in Year: 2016

MCQ▾

Question

The temperature inside a refrigerator is t2 and the room temperature is t1 . The amount of heat deliver to the room for each joule of electrical energy consumed ideally will be –

Choices

Choice (4) Response
a.

t1t1t2

b.

t1+t2t1+273

c.

t2+273t1t2

d.

t1+273t1t2

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