In the figure shown, the magnetic field induction at the point O will be
1
2
3
4
Official Solution
Correct Option:
(2)
Step 1: Concept
Field due to a straight wire of infinite length is if the point is on a line perpendicular to its length while at the centre of a semicircular coil is . Step 2: Analysis
The total magnetic field at O is the vector sum of fields due to the two straight sections ( and ) and the semicircular section ( ). Step 3: Calculation
$ (\frac{\mu_{0}}{4\pi})(\frac{i}{r})(\pi+2)$ out of the page. Final Answer: (B)
02
PYQ 2014
medium
physicsID: met-2014
A square loop of side carries current . Find magnetic field at centre.
1
2
3
4
Official Solution
Correct Option:
(3)
Concept:
Magnetic field due to finite wire:
Step 1: Geometry
Distance from centre to side:
Step 2: Field due to one side
Step 3: Total field (4 sides) Conclusion:
03
PYQ 2015
medium
physicsID: met-2015
Two wires of same lengths are shaped into a square and a circle. If they carry same current, then the ratio of their magnetic moments is
1
2
3
4
Official Solution
Correct Option:
(3)
Step 1: Understanding the Concept:
Magnetic moment: . Same wire length different areas for square and circle. Step 2: Detailed Explanation:
Let total wire length . For square: , . For circle: , . Ratio of magnetic moments: . Step 3: Final Answer:
About Magnetic Field - MET
Magnetic Field is a vital chapter for MET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Magnetic Field PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Magnetic Field carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
