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← JEE Main 2022 · 29 Jun · Shift 1
PhysicsSingle correct+4 / -1Question 45 of 90

JEE Main 2022 · 29 Jun · Shift 1, Physics question 45

At a certain place the angle of dip is 30° and the horizontal component of earth's magnetic field is 0.5 G. The earth's total magnetic field (in G), at that certain place, is :

Choose one option
Answer and worked solution

Official answer: A

Total field. B=BHcos⁡30°=0.53/2=13B=\dfrac{B_H}{\cos30°}=\dfrac{0.5}{\sqrt3/2}=\dfrac1{\sqrt3} G.

(A)