Question
Download Solution PDFWhich of the following best represents the variation of magnetic induction B with distance r from a long straight current-carrying wire?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 4) i.e.
CONCEPT:
- Magnetic field due to a straight current-carrying conductor: Biot-Savart Law
- Magnetic field B at a radial distance r, due to a wire carrying current is given by:
\(B = \frac{μ_0I}{2π r}\)
Where μ0 is the permeability of free space (4π × 10-7 Tm/A), and I is the current intensity.
EXPLANATION:
Magnetic field intensity, \(B = \frac{μ_0I}{2π r}\)
\(⇒ B ∝ \frac{1}{r}\)
Thus, the magnetic field is inversely proportional to the distance from the current-carrying wire.
This is represented by the graph in option 4).
Last updated on Jun 20, 2025
-> The Indian Navy SSR Agniveeer Merit List has been released on the official website.
-> The Indian Navy Agniveer SSR CBT Exam was conducted from 25th to 26th May 2025.
->The application window was open from 29th March 2025 to 16th April 2025.
-> The Indian Navy SSR Agniveer Application Link is active on the official website of the Indian Navy.
.->Only unmarried males and females can apply for Indian Navy SSR Recruitment 2025.
-> The selection process includes a Computer Based Test, Written Exam, Physical Fitness Test (PFT), and Medical Examination.
->Candidates Qualified in 10+2 with Mathematics & Physics from a recognized Board with a minimum 50% marks in aggregate can apply for the vacancy.
-> With a salary of Rs. 30,000, it is a golden opportunity for defence job seekers.
-> Candidates must go through the Indian Navy SSR Agniveer Previous Year Papers and Agniveer Navy SSR mock tests to practice a variety of questions for the exam.