MHT CET 2021 20th September Morning Shift | MHT CET Year Wise Previous Years Questions

A solid sphere of mass $$\mathrm{M}$$, radius $$\mathrm{R}$$ has moment of inertia '$$\mathrm{I}$$' about its diameter. It is recast into a disc of thickness 't' whose moment of inertia about an axis passing through its edge and perpendicular to its plane remains 'I'. Radius of the disc will be

$$\frac{4 R}{\sqrt{11}}$$

$$\frac{3 R}{4}$$

$$\frac{2 R}{\sqrt{15}}$$

$$\frac{2 R}{3}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-0

The depth 'd' below the surface of the earth where the value of acceleration due to gravity becomes $$\left(\frac{1}{n}\right)$$ times the value at the surface of the earth is $$(R=$$ radius of the earth)

$$\mathrm{R}\left(\frac{\mathrm{n}-1}{\mathrm{n}}\right)$$

$$R\left(\frac{n}{n+1}\right)$$

$$\frac{R}{n}$$

$$\frac{\mathrm{R}}{\mathrm{n}^2}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-0

Silicon and copper are cooled from 300 K to 100 K, the specific resistance (resistivity)

increases in both copper and silicon

decreases in both copper and silicon

decreases in copper and increases in silicon

increases in copper and decreases in silicon