Magnetism Question 128
Question: The magnetic needle of a tangent galvanometer is deflected at an angle 30o due to a magnet. The horizontal component of earth’s magnetic field 0.34 ´ 10?4 T is along the plane of the coil. The magnetic intensity is
[AIIMS 2000, 2002; BHU 2000; AFMC 2000; KCET (Engg./Med.) 1999]
Options:
A) 1.96 ´ 10?4 T
B) 1.96 ´ 10?5 T
C) 1.96 ´ 104 T
D) 1.96 ´ 105 T
Show Answer
Answer:
Correct Answer: B
Solution:
$ B=B _{H}\tan \theta $
$ =0.34\times {{10}^{-4}}\tan 30{}^\circ =1.96\times {{10}^{-5}}T $
BETA
