Physics · Units, Dimensions & Error Analysis

JEE Main 2025 — 4 April, Evening Shift — Question 45

In an electromagnetic system, a quantity defined as the ratio of electric dipole moment and magnetic

dipole moment has dimension of $\left[M^{P} L^{Q} T^{R} A^{S}\right]$ . The value of $P$ and $Q$ are :

Answer: C

$E=\frac{1}{4 \pi \varepsilon_{0}} \frac{P_{E}}{r^{3}}$

$B=\frac{\mu_{0}}{4 \pi} \frac{P_{m}}{r^{3}}$

$\frac{E}{B}=\frac{1}{\mu_{0} \varepsilon_{0}} \cdot \frac{P_{E}}{P_{m}}$

$L^{-1} T^{1}=\frac{P_{E}}{P_{m}}$

Answer key and solution verified before publishing.

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