Physics Electromagnetic Induction SZABMU 2024
PMDC Verified Question 5 of 69
The rate of change of magnetic flux is measured in
A
Coulomb
B
Ohm
C
Volt
D
Watt
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Volt
Concept:

According to Faraday's Law, the induced electromotive force (EMF) is mathematically equal to the rate of change of magnetic flux.

Formula:

$$ \varepsilon = -N \frac{\Delta \phi}{\Delta t} $$

Solution:

  • Since EMF (\( \varepsilon \)) is measured in Volts, the term representing the rate of change of magnetic flux (\( \frac{\Delta \phi}{\Delta t} \), or Webers per second) must have identically the same unit.


  • Therefore, it is measured in Volts.


Why other options are incorrect:

Coulomb is the unit of electric charge. Ohm is for electrical resistance. Watt is for electrical power (Joules per second).

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