Physics Alternating Current ETEA 2015
PMDC Verified Question 114 of 127
For electromagnetic waves, Maxwell generalized which of the following laws?
A
Gauss's law for magnetism
B
Gauss's law for electricity
C
Faraday's law
D
Ampere's law
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Ampere's law
Concept:

Ampere's original circuital law was incomplete for non-steady currents. Maxwell added the displacement current term \(\varepsilon_0 \frac{d\Phi_E}{dt}\).

Formula / Reaction:

$$\oint \vec{B} \cdot d\vec{l} = \mu_0 \left( I + \varepsilon_0 \frac{d\Phi_E}{dt} \right)$$

Solution:

  • Maxwell generalized Ampere's Law by incorporating the displacement current, making the equations symmetric and predicting the existence of electromagnetic waves.


Why other options are incorrect:

  • Opt_A, Opt_B: Gauss's laws describe static field divergences.


  • Opt_C: Faraday formulated electromagnetic induction, which Maxwell adopted directly.

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