Verified Solution • 2025–26 Session moderate

QPages 228-229: Q10: HC Verma: Concepts of Physics - Volume 2 Magnetic Field Pages 228-229: Q10 Solution: Verify that the units weber and volt second are the same.

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often treat a volt‑second as merely a product of electric potential and time and forget that Faraday’s law defines magnetic flux as the time integral of emf; thus they miss that $1\,\text{Wb}=\int\!V\,dt=1\,\text{V·s}$. Remember to link the unit to the physical definition, not to unrelated energy‑time dimensions.

Verify that the units weber and volt second are the same.

Step-by-Step Verified Solution

**Answer:** Both weber and volt-second have the same dimensions. **Step-by-Step Explanation:** Magnetic flux

\Phi

has SI unit weber (Wb). From Faraday's law,

\mathcal{E} = -d\Phi/dt

, so

\Phi = \int \mathcal{E} \, dt

. The unit of

\mathcal{E}

is volt (V), so the unit of flux is volt-second (V�s). Hence, 1 Wb = 1 V�s.

All Questions in this Chapter

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