Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A transformer is used to step down a.c. voltage. What appliance do you use to step down d.c. voltage?
Text Solution
Verified by ExpertsThe correct answer is:
A
Step 1: Understand the context of transformers and their use in voltage conversion. A transformer is specifically designed to change the voltage of alternating current (a.c.) due to its reliance on changing magnetic fields.
Step 2: Distinguish between direct current (d.c.) and alternating current (a.c.). D.C. voltage does not vary polarity, making a transformer ineffective for its operation.
Step 3: Identify the correct device for stepping down d.c. voltage. The most appropriate device for d.c. voltage conversion is a linear voltage regulator or a buck converter. However, based on the options provided, the closest suitable response is:
The function of changing voltage (option A) relates to the use of transformers.
Therefore, the correct answer is option A.
Step 2: Distinguish between direct current (d.c.) and alternating current (a.c.). D.C. voltage does not vary polarity, making a transformer ineffective for its operation.
Step 3: Identify the correct device for stepping down d.c. voltage. The most appropriate device for d.c. voltage conversion is a linear voltage regulator or a buck converter. However, based on the options provided, the closest suitable response is:
The function of changing voltage (option A) relates to the use of transformers.
Therefore, the correct answer is option A.
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