0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

# The earth's magnetic fieldvaries in direction but not in magnitudevaries in magnitude but not in directionvaries in both magnitude and directionis centred exactly about the centre of the earth

A
varies in direction but not in magnitude
B
varies in both magnitude and direction
C
varies in magnitude but not in direction
D
is centred exactly about the centre of the earth
Solution
Verified by Toppr

#### The magnetic field around the earth is like that around the bar magnet as shown. The magnetic lines of force emerge from geographic south pole and enter the north pole forming closed loops. Hence the magnetic field changes in both magnetic and direction at all points.

0
Similar Questions
Q1

A satellite S is moving in a circular orbit around the earth, then choose the correct option (The mass of the satellite is very small as compared to the mass of the earth).

View Solution
Q2
A bob of mass m attached to an inextensible string of length l is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed ω rad/S about the vertical. About the point of suspension,

View Solution
Q3
How far from the centre of the Moon is the Earth-Moon neutral point, where the Earth and the Moon's gravitational field strengths are equal in magnitude but opposite in direction?

ME=6.0×1024kg MM=7.4×1022kg
The radius of Moon's orbit (assumed to be circular) is: 3.8×108m.

View Solution
Q4
Which of the following will rotate the plane of polarisation in exactly equal amounts (same magnitude) but in opposite directions?
View Solution
Q5
Fleming's left hand rule tells us about direction of magnetic force due to current in magnetic field, but what is its magnitude?
View Solution