COMEDK 2025 Afternoon Shift | Units & Measurements Question 2 | Physics

In the expression $\mathrm{P}=\mathrm{El}^2 \mathrm{~m}^{-5} \mathrm{G}^{-2}$ where $\mathrm{E}, 1, \mathrm{~m}$ and G represent Energy, Angular Momentum, Mass and Gravitational Constant, the dimensions of P are

$\left[\mathrm{M}^1 \mathrm{~L}^2 \mathrm{~T}^{-2}\right]$

$\left[\mathrm{M}^0 \mathrm{~L}^2 \mathrm{~T}^{-2}\right]$

$\left[\mathrm{M}^0 \mathrm{~L}^0 \mathrm{~T}^0\right]$

$\left[\mathrm{M}^0 \mathrm{~L}^0 \mathrm{~T}^{-2}\right]$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

The nuclear forces

a. are central forces, independent of the spin of the nucleons.

b. have a short-range dominant over a distance of about a few fermi

c. are stronger being hundred times stronger than that of electromagnetic forces.

d. are independent of the nuclear charge.

Which of the above is not true?

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

Two light rays A and B travel from a medium into air at angles of incidence 15 degrees and 42 degrees respectively. In the medium, light travels 3 cm in 0.2 ns . Will there be total internal reflection? If so, which ray?

Yes, A

Yes, B

Yes, Both A and B

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

An electric field $E=3 x^2 i N C^{-1}$ exists in a certain region of space. The potential difference between the origin and at $x=4 m, V_0-V_4$ is

$-$20 V

$-$40 V

$-$64 V

64 V

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