Due to the earth's magnetic field, charged cosmic ray particles
Can never reach the equator
Require less kinetic energy to reach the equator than the poles
Require greater kinetic energy to reach the equator than the poles
Can never reach the poles
At which place, earth's magnetism become horizontal
The lines joining the places of the same horizontal intensity are known as
At an angle of $30^{\circ}$ to the magnetic meridian, the apparent dip is $45^{\circ} .$ Find the true dip :
Consider the plane $\mathrm{S}$ formed by the dipole axis and the axis of earth. Let $\mathrm{P}$ be point on the magnetic equator and in $\mathrm{S}$. Let $\mathrm{Q}$ be the point of intersection of the geographical and magnetic equators. Obtain the declination and dip angles at $\mathrm{P}$ and $\mathrm{Q}$
A short magnetic needle is pivoted in a uniform magnetic field of strength $1 \,T.$ When another magnetic field of strength $\sqrt 3 \,T$ is applied to the needle in a perpendicular direction, the needle deflects through an angle $\theta$, where $\theta$ is....$^o$