JEE Main 2024 (Online) 4th April Morning Shift | Heat and Thermodynamics Question 21 | Physics

The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are $$8 \Omega$$ and $$10 \Omega$$ respectively. After inserting in a hot bath of temperature $$400^{\circ} \mathrm{C}$$, the resistance of platinum wire is :

10 $$\Omega$$

16 $$\Omega$$

8 $$\Omega$$

2 $$\Omega$$

JEE Main 2024 (Online) 4th April Morning Shift

MCQ (Single Correct Answer)

-1

On celcius scale the temperature of body increases by $$40^{\circ} \mathrm{C}$$. The increase in temperature on Fahrenheit scale is :

$$75^{\circ} \mathrm{F}$$

$$70^{\circ} \mathrm{F}$$

$$72^{\circ} \mathrm{F}$$

$$68^{\circ} \mathrm{F}$$

JEE Main 2024 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

A diatomic gas $(\gamma=1.4)$ does $200 \mathrm{~J}$ of work when it is expanded isobarically. The heat given to the gas in the process is :

$800 \mathrm{~J}$

$600 \mathrm{~J}$

$700 \mathrm{~J}$

$850 \mathrm{~J}$

JEE Main 2024 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

If the root mean square velocity of hydrogen molecule at a given temperature and pressure is $2 \mathrm{~km} / \mathrm{s}$, the root mean square velocity of oxygen at the same condition in $\mathrm{km} / \mathrm{s}$ is :

1.0

1.5

2.0

0.5

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