If the angles of dip at two places are 30∘ and 45∘ respectively, then the ratio of horizontal components of earth's magnetic field at the two places will be
√3:√2
1:√2
1:2
1:√3
A
√3:√2
B
1:√2
C
1:√3
D
1:2
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Solution
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The horizontal component of earth's magnetic field is given by , H=Rcosδ where, δ is the angle of dip so H1=Rcos30o and H2=Rcos45o ∴H1H2=Rcos30oRcos45o=√3/21/√2=√3√2
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