Physics · Units, Dimensions & Error Analysis

JEE Main 2026 — 8 April, Evening Shift — Question 1

A new unit $(\alpha)$ of length is chosen such that it is equal to the speed of light in vacuum. What is the distance between Venus and Earth in terms of $\alpha$ units if light takes 6 min. 40 s to cover this distance?

Option A:
$200\alpha$
Option B:
$400\alpha$
Correct
Option C:
$300\alpha$
Option D:
$500\alpha$

Answer: B

Step-by-step solution

$\alpha = 3\times10^8$ m. Time = 6 min 40 s = 400 s. Distance = $400 \times 3\times10^8$ m = $400\alpha$ .

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Exam: JEE Main 2026
Paper: 8 April, Evening Shift
Subject: Physics
Chapter: Units, Dimensions & Error Analysis
Topic: Units and Dimensions Analysis

Consider the equation H = frac x^ p e^ q E^ r t^ s where H = magnetic field E = electric field epsilon = permittivity, x = distance, t =…

Answer: B

Step-by-step solution

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