The formula for magnetic field of a certain component is given by
where, = total number of turns, = current, = radius. The component is:
1
ring
2
solenoid
3
toroid
4
None of these
Official Solution
Correct Option:
(3)
Concept:
Magnetic field inside a toroid is:
Step 1: Identify formula.
Given expression matches exactly with toroid field formula. Step 2: Conclusion.
02
PYQ 2021
medium
physicsID: met-2021
Two wires PQ and QR carry equal currents I as shown in figure. One end of both the wires extends to infinity . The magnitude of the magnetic field at O on the bisector of these two wires at a distance r from point Q is:
1
2
3
4
Official Solution
Correct Option:
(4)
Concept:
Magnetic field due to a semi-infinite straight wire:
Step 1: Field due to each wire.
Each wire is semi-infinite, so for point O:
Similarly for second wire:
Step 2: Direction of fields.
Using right-hand rule, fields due to both wires are symmetric.
Resolve along bisector direction. Step 3: Resultant field.
About Amperes Circuital Law - MET
Amperes Circuital Law 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 Amperes Circuital Law 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 Amperes Circuital Law carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
