Consider the following statement:
As one moves from one place to another , the magnetic field of the earth will vary
1) in magnitude 2) in direction
3) linearly with height 4) linearly with the temperature of the place of these statements
Pls attach the explanation too!!
Answers
Answer:
the true answer is option 2. in direction
Answer:
mark it as brainlest answer please
Explanation:
(a) The three quantities are:-
1. Magnetic declination
2.Angle of dip and
3. The horizontal component of the earth's magnetic field.
(b) Britain is close to magnetic north pole. Therefore, the angle of dip is grater in Britain than in India. It is about 70
o
.
(c) The magnetic field lines of the earth could seem out of the ground. It is because, Melbourne (Australia) is in Southern hemisphere.
(d) The magnetic compass needle can point in any direction on the geomagnetic north or South pole. It is because the horizontal component of the earth's field is zero at these points
(∵ The earth's field is vertical).
(e) The magnetic field at a point on the equatorial line of the ,agnetic dipole (earth as a magnetic dipole) is given by,
B=
4π
μ
0
×
r
3
M
M=8×10
22
JY
−1
r=6.4×10
6
m
∴B=10
−7
×
(6.4×10
6
)
3
8×10
22
=0.3×10
−4
T=0.3G
It is really of the order of the observed field of earth
(f) The earth's magnetic field is only approximately a dipole field. The local N>S poles may be oriented due to the different deposits of magnetised minerals.