COMEDK 2025 Morning Shift | Units & Measurements Question 21 | Physics

Young's modulus of the material of wires X and Y are in the ratio 4:1 and the areas of cross sections of the wires X and Y are in the ratio $2: 1$. If the same amount of load is applied to both the wires, the ratio of elongation produced in the wires X and Y will be: (Assume length of the wires X and Y initially are the same)

$1: 8$

$1: 1$

$8: 1$

$1: 2$

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

The dimension $$[\mathrm{ML}^{-1} \mathrm{~T}^{-2}]$$ is the physical quantity of

Pressure $$\times$$ Area

$$\mathrm{\frac{Force}{Pressure}}$$

Power $$\times$$ Time

Energy density

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

If units of mass, length and gravitational constant are chosen to fundamental units, the dimensions of time would be

$$ \mathrm{M}^{1 / 2} \mathrm{~L}^{1 / 2} \mathrm{G}^{-1 / 2} $$

$$ \mathrm{M}^1 \mathrm{~L}^{1 / 2} \mathrm{G}^2 $$

$$ \mathrm{M}^{-1 / 2} \mathrm{~L}^{3 / 2} \mathrm{G}^{-1 / 2} $$

$$ \mathrm{M}^{-1} \mathrm{~L}^3 \mathrm{G}^{-1} $$

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

-0

Which of the given dimensional formula represents heat capacity

$$\left[\mathrm{ML}^2 \mathrm{~T}^{-2} \mathrm{~K}^{-1}\right]$$

$$\left[\mathrm{ML}^2 \mathrm{~T}^{-1} \mathrm{~K}^{-1}\right]$$

$$\left[\mathrm{ML}^2 \mathrm{~T}^{-2} \mathrm{~K}^{-2}\right]$$

$$\left[\mathrm{MLT}^{-2} \mathrm{~K}^{-1}\right]$$

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