The period of oscillations of a magnetic needle in a magnetic field is 1.0 s If the length of the needle is halved by cutting it then the time period will be
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
1.0 s
b
0.5 s
c
0.25 s
d
2.0 s
answer is B.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
We know thatT=2πIMBHWhen length is halved, M is also halved and I becomes (1/8)∴T′=2πI×28×MBH =12T=1⋅02=0⋅5 second