Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
462 views
in Physics by (56.9k points)

A 480 turn circular-loop coil 7.25 cm in radius is initially aligned so that its axis is parallel to the Earth's magnetic field. In 2.77 ms, the coil is flipped so that its axis is perpendicular to the Earth's magnetic field. If an average voltage of 0.170 V is thereby induced in the coil, what is the value of the Earth's magnetic field (in μT) at that location? 

(1) 59 

(2) 48 

(3) 65 

(4) 39 

(5) 43 

1 Answer

+1 vote
by (59.7k points)
selected by
 
Best answer

Correct option: (1) 59

Explanation:

The emf for a circular coil which is rotated in this way is E = Nπr2 B/Δt, where N = 480, r =0.0725, E = 0.170 and Δt = 0.00277. This yields B = 59 μT.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...