In Class 12 Boards there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 12 Physics Chapter 7 Semiconductor Alternating Current Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Physics Alternating Current to know their preparation level.
In CBSE Class 12 Physics Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Alternating Current Case Study Questions With answers
Here, we have provided case-based/passage-based questions for Class 12 Physics Chapter 7 Alternating Current
Case Study/Passage-Based Questions
A transformer is essentially an a.c. device. It cannot work on d.c. It changes alternating voltages or currents. It does not affect the frequency of a.c. It is based on the phenomenon of mutual induction. A transformer essentially consists of two coils of insulated copper wire having a different number of turns and wound on the same soft iron core.
The number of turns in the primary and secondary coils of an ideal transformer is 2000 and 50 respectively. The primary coil is connected to the main supply of 120 V and the secondary coil is connected to a bulb of resistance 0.6Ω
(i) The value of voltage across the secondary coil is
|(a) 5V||(b) 2V||(c) 3 V||(d) 10 V|
Answer:(c) 3 V
(ii) The value of current in the bulb is
|(a) 7 A||(b) 15 A||(c) 3 A||(d) 5 A|
Answer:(d) 5 A
(iii) The value of current in the primary coil is
|(a) 0.125 A||(b) 2.52 A||(c) 1.51 A||(d) 3.52 A|
Answer:(a) 0.125 A
(iv) Power in primary coil is
|(a) 20W||(b) 5W||(c) 10 W||(d) 15W|
(v) Power in secondary coil is
|(a) 15W||(b) 20 W||(c) 7W||(d) 8 W|
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