JEE Main 2016 (Online) 9th April Morning Slot | Heat and Thermodynamics Question 264 | Physics

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JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

The ratio of work done by an ideal monoatomic gas to the heat supplied to it in an isobaric process is :

$${3 \over 5}$$

$${2 \over 3}$$

$${3 \over 2}$$

$${2 \over 5}$$

JEE Main 2016 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

200 g water is heated from 40^oC to 60^oC. Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water = 4184 J/kg/K) :

8.4 kJ

4.2 kJ

16.7 kJ

167.4 kJ

JEE Main 2016 (Offline)

MCQ (Single Correct Answer)

-1

An ideal gas undergoes a quasi static, reversible process in which its molar heat capacity $$C$$ remains constant. If during this process the relation of pressure $$P$$ and volume $$V$$ is given by $$P{V^n} = $$ constant, then $$n$$ is given by (Here $${C_p}$$ and $${C_v}$$ are molar specific heat at constant pressure and constant volume, respectively:

$$n = {{{C_p} - C} \over {C - {C_v}}}$$

$$n = {{C - {C_v}} \over {C - {C_p}}}$$

$$n = {{{C_p}} \over {{C_v}}}$$

$$n = {{C - {C_p}} \over {C - {C_v}}}$$

JEE Main 2016 (Offline)

MCQ (Single Correct Answer)

-1

A pendulum clock loses $$12$$ $$s$$ a day if the temperature is $${40^ \circ }C$$ and gains $$4$$ $$s$$ a day if the temperature is $${20^ \circ }C.$$ The temperature at which the clock will show correct time, and the co-efficient of linear expansion $$\left( \alpha \right)$$ of the metal of the pendulum shaft are respectively :

$${30^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 3}}/{}^ \circ C$$

$${55^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 2}}/{}^ \circ C$$

$${25^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 5}}/{}^ \circ C$$

$${60^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 4}}/{}^ \circ C$$

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