1
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

An ice cube of dimensions $$60 \mathrm{~cm} \times 50 \mathrm{~cm} \times 20 \mathrm{~cm}$$ is placed in an insulation box of wall thickness $$1 \mathrm{~cm}$$. The box keeping the ice cube at $$0^{\circ} \mathrm{C}$$ of temperature is brought to a room of temperature $$40^{\circ} \mathrm{C}$$. The rate of melting of ice is approximately :

(Latent heat of fusion of ice is $$3.4 \times 10^{5} \mathrm{~J} \mathrm{~kg}^{-1}$$ and thermal conducting of insulation wall is $$0.05 \,\mathrm{Wm}^{-1 \circ} \mathrm{C}^{-1}$$ )

A
$$61 \times 10^{-3} \mathrm{~kg} \mathrm{~s}^{-1}$$
B
$$61 \times 10^{-5} \mathrm{~kg} \mathrm{~s}^{-1}$$
C
$$208 \mathrm{~kg} \mathrm{~s}^{-1}$$
D
$$30 \times 10^{-5} \mathrm{~kg} \mathrm{~s}^{-1}$$
2
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A gas has $$n$$ degrees of freedom. The ratio of specific heat of gas at constant volume to the specific heat of gas at constant pressure will be :

A
$$ \frac{n}{n+2}$$
B
$$ \frac{n+2}{n}$$
C
$$ \frac{n}{2n+2}$$
D
$$ \frac{n}{n-2}$$
3
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A transverse wave is represented by $$y=2 \sin (\omega t-k x)\, \mathrm{cm}$$. The value of wavelength (in $$\mathrm{cm}$$) for which the wave velocity becomes equal to the maximum particle velocity, will be :

A
4$$\pi$$
B
2$$\pi$$
C
$$\pi$$
D
2
4
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A battery of $$6 \mathrm{~V}$$ is connected to the circuit as shown below. The current I drawn from the battery is :

JEE Main 2022 (Online) 26th July Evening Shift Physics - Current Electricity Question 88 English

A
1A
B
2A
C
$$\frac{6}{11}$$ A
D
$$\frac{4}{3}$$ A
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