Discussion
A square loop of side 0.2 m lies in a field increasing at 0.5 T/s normal to it. The emf induced is
Answer: A
Correct answer: 20 mV
\[ \mathrm{emf} = A\frac{\mathrm{d}B}{\mathrm{d}t} = (0.2)^{2} \times 0.5 = 0.04 \times 0.5 = 0.02\ \mathrm{V} = 20\ \mathrm{mV}. \] The area is the square of the side, and using the side itself gives 100 mV, which is offered here. The field is normal to the loop, so the whole of it links.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development