AIPMT 2006 | Heat and Thermodynamics Question 73 | Physics

The molar specific heat at constant pressure of an ideal gas is (7/2) R. The ratio of specific heat at constant pressure to that at constant volume is

9/7

7/5

8/7

5/7

AIPMT 2006

MCQ (Single Correct Answer)

-1

A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency ?

380 K

275 K

325 K

250 K

AIPMT 2005

MCQ (Single Correct Answer)

-1

Which of the following processes is reversible?

Transfer of heat by conduction

Transfer of heat by radiation

Isothermal compression

Electrical heating of a nichrome wire.

AIPMT 2005

MCQ (Single Correct Answer)

-1

An ideal gas heat engine operates in Carnot cycle between 227^oC and 127^oC. It absorbs 6 $$ \times $$ 10⁴ cal of heat at higher temperature. Amount of heat converted to work is

4.8 $$ \times $$ 10⁴ cal

6 $$ \times $$ 10⁴ cal

2.4 $$ \times $$ 10⁴ cal

1.2 $$ \times $$ 10⁴ cal.

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