Physics Electromagnetic Induction DUHS 2023
PMDC Verified Question 33 of 69
The main function of a transformer is to convert.
A
One direct voltage to another direct voltage of different magnitude
B
One alternating voltage to another alternating voltage of different magnitude
C
A high value alternating voltage to a low value direct voltage
D
A high value alternating voltage to a high value direct voltage
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: One alternating voltage to another alternating voltage of different magnitude
Concept:

Transformers only function when exposed to changing magnetic fields, which are naturally provided by alternating currents.

Solution:

  • The primary purpose of a transformer is to act as a step-up or step-down bridge in an AC network.


  • Therefore, it converts one alternating voltage to another alternating voltage of different magnitude, maintaining the same frequency.


Why other options are incorrect:

Transformers cannot operate on direct voltage (DC) because static flux induces no EMF. They also do not perform rectification (converting AC to DC).

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