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At a given place on the Earth’s surface, the horizontal component of Earth’s magnetic field is 9 × 10-5 T and the resultant magnetic field is 180 × 10-6. Calculate the angle of dip at this place.
  • a)
    45o
  • b)
    0o
  • c)
    60o
  • d)
    30o
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
At a given place on the Earth’s surface, the horizontal componen...
Given: H = 9 × 10-5; R = 180 × 10-6 = 18 × 10-5
The required equation ➔ H=Rcosδ

Therefore, δ = cos-1 1/2 
=60o
Thus, the angle of dip is 60o.
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Most Upvoted Answer
At a given place on the Earth’s surface, the horizontal componen...
Given: H = 9 × 10-5; R = 180 × 10-6 = 18 × 10-5
The required equation ➔ H=Rcosδ

Therefore, δ = cos-1 1/2 
=60o
Thus, the angle of dip is 60o.
Free Test
Community Answer
At a given place on the Earth’s surface, the horizontal componen...
Given data:
Horizontal component of Earth's magnetic field (Bh) = 9 × 10^-5 T
Resultant magnetic field (B) = 180 × 10^-6 T

Calculating the angle of dip:
The angle of dip (θ) can be calculated using the formula:
B = Bh * cos(θ)
Given that B = 180 × 10^-6 T and Bh = 9 × 10^-5 T, we can rearrange the formula to solve for cos(θ):
cos(θ) = B / Bh
cos(θ) = (180 × 10^-6) / (9 × 10^-5)
cos(θ) = 0.02
To find the angle θ, we need to calculate the arccosine of 0.02:
θ = arccos(0.02)
θ ≈ 60°
Therefore, the angle of dip at this place is approximately 60°. Hence, the correct answer is option C - 60°.
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