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

The focal length of thin convex lens for red and blue rays are $$100 \mathrm{~cm}$$ and $$98.01 \mathrm{~cm}$$, respectively. There, the dispersive power of the material of the lens is

A
0.968
B
0.98
C
0.020
D
0.325
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The ratio of the acceleration for a solid sphere (mass $$m$$ and radius $$R$$) rolling down an incline of angle '$$\theta$$' without slipping down the incline without rolling is.

A
5 : 7
B
2 : 3
C
2 : 5
D
7 : 5
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The de-Broglie wavelength of a proton $$\left(m=1.67 \times 10^{-27} \mathrm{~kg}\right)$$ acclerated through a potential difference of $$2 \mathrm{~kV}$$ is

A
$$600 \mathop A\limits^o$$
B
$$0.636 \times 10^{-12} \mathrm{~m}$$
C
$$7 \mathop A\limits^o$$
D
$$0.63 \mathrm{~nm}$$
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The frequency of a sonometer wire is $$100 \mathrm{~Hz}$$ When the weights producing the tensions are completely immersed in water, the frequence becomes $$60 \mathrm{~Hz}$$ and on immersing the weights in a certain liquid, the frequency becomes $$40 \mathrm{~Hz}$$. The specific gravity of the liquid is

A
1.42
B
1.31
C
1.82
D
1.21
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