Magnetism Question 255
Question: Time periods of vibation of two bar magnets in sum and difference positions are 4 sec and 6 sec respectively. The ratio of their magnetic moments $ M _{1}/M _{2} $ is
Options:
A) 6 : 4
B) 30 : 16
C) 2.6 : 1
D) 1.5 : 1
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ \frac{M _{1}}{M _{2}}=\frac{T _{2}^{2}+T _{1}^{2}}{T _{2}^{2}-T _{1}^{2}}=\frac{6^{2}+4^{2}}{6^{2}-4^{2}}=\frac{52}{20}=(2.6):1 $
BETA
