Doubtclip is an AI tutor that turns any homework or exam doubt into a step-by-step whiteboard video lesson with diagrams, formulas, and voice explanation.

Which subjects and exams does it support?

It supports Physics, Chemistry, Mathematics/Calculus and related STEM doubts for school boards, JEE, NEET, and global high-school / undergrad practice.

How do I get a video solution?

Upload a photo of the question or paste the text, sign in, and Doubtclip generates a whiteboard-style explanation video you can watch and share.

Is Doubtclip available worldwide?

Yes. Doubtclip is a web app for students globally. Lessons are available in English and Hinglish.

Units & Dimensions

JEE Main level, single correct, medium

129 of 149

Question 129 of 149

$A, B, C$ , and $D$ are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation $AD=C ln(BD)$ holds true. Then which of the combination is not a meaningful quantity?

Show answer and solution

Answer: (D) $\dfrac{{A}^{2}-AC}{D}$

The dimension of

A

is not equal to the dimension of

C

Hence it is not possible to subtract

AC

from

{A}^{2}

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.

More Physics practice

JEE Main Physics practice question on Units & Dimensions (Dimensions), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.

A,B,CA, B, CA,B,C, and DDD are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation AD=Cln(BD)AD=C ln(BD)AD=Cln(BD) holds true. Then which of the combination is not a meaningful quantity?

JEE Main question paper PDF

More Physics practice

$A, B, C$ , and $D$ are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation $AD=C ln(BD)$ holds true. Then which of the combination is not a meaningful quantity?