NEET 2023 | Heat and Thermodynamics Question 3 | Physics

NEET 2023

MCQ (Single Correct Answer)

-1

The temperature of a gas is $$-50^{\circ} \mathrm{C}$$. To what temperature the gas should be heated so that the rms speed is increased by $$3$$ times?

$$3295^{\circ} \mathrm{C}$$

$$3097 \mathrm{~K}$$

$$223 \mathrm{~K}$$

$$669^{\circ} \mathrm{C}$$

NEET 2023

MCQ (Single Correct Answer)

-1

A Carnot engine has an efficiency of $$50 \%$$ when its source is at a temperature $$327^{\circ} \mathrm{C}$$. The temperature of the sink is :-

$$15^{\circ} \mathrm{C}$$

$$100^{\circ} \mathrm{C}$$

$$200^{\circ} \mathrm{C}$$

$$27^{\circ} \mathrm{C}$$

NEET 2022 Phase 2

MCQ (Single Correct Answer)

-1

An ideal gas follows a process described by the equation $$P{V^2} = C$$ from the initial $$({P_1},\,{V_1},\,{T_1})$$ to final $$({P_2},\,{V_2},\,{T_2})$$ thermodynamic states, where C is a constant. Then

If $${P_1} > {P_2}$$ then $${V_1} > {V_2}$$

If $${P_1} > {P_2}$$ then $${T_1} < {T_2}$$

If $${V_2} > {V_1}$$ then $${T_2} > {T_1}$$

If $${V_2} > {V_1}$$ then $${T_2} < {T_1}$$

NEET 2022 Phase 2

MCQ (Single Correct Answer)

-1

Two rods one made of copper and other made of steel of same length and same cross sectional area are joined together. The thermal conductivity of copper and steel are 385 J s^$$-$$1 K^$$-$$1 m^$$-$$1 and 50 J s^$$-$$1 K^$$-$$1 m^$$-$$1 respectively. The free ends of copper and steel are held at 100$$^\circ$$C and 0$$^\circ$$C respectively. The temperature at the junction is, nearly :

$$88.5^\circ C$$

$$12^\circ C$$

$$50^\circ C$$

$$73^\circ C$$

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