Physics Alternating Current ETEA 2016
PMDC Verified Question 100 of 127
The changing electric flux in a certain region of space produces:
A
An electric field
B
A magnetic field
C
Both electric and magnetic fields
D
None of the above
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: A magnetic field
Concept:

According to the Maxwell-Ampere law, a time-varying electric field acts as a source of a magnetic field.

Formula / Reaction:

$$\oint \vec{B} \cdot d\vec{l} = \mu_0 I_C + \mu_0 \varepsilon_0 \frac{d\Phi_E}{dt}$$

Solution:

  • A changing electric flux \(\frac{d\Phi_E}{dt}\) induces a magnetic field \(\vec{B}\) in the surrounding space, forming the foundation of electromagnetic wave propagation.


Why other options are incorrect:

  • Opt_A: A changing magnetic flux produces an electric field (Faraday's law), not a changing electric flux.


  • Opt_C: The direct entity generated by changing electric flux is a magnetic field.


  • Opt_D: Option B is correct.

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