AIIMS 2009
- Exam
- AIIMS
- Year
- 2009
- Subject
- Physics
- Chapter
- Alternating Current
AIIMS 2009 · Physics · Alternating Current
Assertion: Transformers are used only in alternating current source...
Assertion: Transformers are used only in alternating current source not in direct current.
Reason : Only a.c. can be stepped up or down by means of transformers.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion
Step-by-step solution
Transformers which convert low voltages into higher ones are called step-up transformers, while those which convert high voltages into lower ones are called step-down transformers. This is possible only for a.c. source and not for d.c. source.