1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

A copper sphere cools from $$82^{\circ} \mathrm{C}$$ to $$50^{\circ} \mathrm{C}$$ in 10 minutes and to $$42^{\circ} \mathrm{C}$$ in the next $$10 \mathrm{~min}$$. Calculate the temperature of the surrounding?

A
$$18.01^{\circ} \mathrm{C}$$
B
$$39.3^{\circ} \mathrm{C}$$
C
$$10.6^{\circ} \mathrm{C}$$
D
$$20^{\circ} \mathrm{C}$$
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

Two gases occupy two containers $$A$$ and $$B$$. The gas in $$A$$ of volume $$0.20 \mathrm{~m}^3$$, exerts a pressure of $$1.40 \mathrm{~MPa}$$ and that in $$B$$, of volume $$0.30 \mathrm{~m}^3$$ exerts a pressure of $$0.7 \mathrm{~MPa}$$. The two containers and united by a tube of negligible volume and the gases are allowed to exchange. Then, if the temperature remains constants. the final pressure in the container will be (in MPa).

A
0.70
B
0.98
C
1.40
D
2.1
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

Assuming the diodes to be of silicon with forward resistance zero, the current $$i$$ in the following circuit is

VITEEE 2023 Physics - Semiconductor Devices and Logic Gates Question 7 English

A
0
B
9.65 mA
C
15 mA
D
10.35 mA
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

With increasing temperature, the angle of contact,

A
decreases
B
increases
C
remains constant
D
sometimes increases and sometimes decreases
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