Magnetism Question 59
Question: At a certain place the angle of dip is 30° and the horizontal component of earth’s magnetic field is 0.50 Oersted. The earth’s total magnetic field is
[CPMT 1990]
Options:
A) $ \sqrt{3} $
B) $ 1 $
C) $ \frac{1}{\sqrt{3}} $
D) $ \frac{1}{2} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ B _{H}=B\cos \varphi ;\ \
Therefore B=\frac{B _{H}}{\cos \varphi }=\frac{0.5}{\cos 30^{o}}=\frac{0.5}{\sqrt{3}/2}=\frac{1}{\sqrt{3}} $
BETA
