Magnetism and magnetic effect

At the Earth's equator vertical component of magnetic field will be ________

• maximum

• minimum

• zero

• none of the option

Aurora australis happens due to __________

• mass of earth

• density of earth

• sunlight

• solar wind

When a bar magnet is cut into 2 pieces along its length its pole strength will be _________

• halved

• zero

• twice

• same

When a bar magnet is cut into 2 pieces perpendicular to its axis its dipole moment will be _________

• halved

• twice

• same

• zero

The magnetic force of attraction or repulsion will same if ___________

• pole strength increases and distance between the poles decreases

• pole strength increases twice and distance between the poles increases twice

• pole strength and distance between the poles are equal in magnitude

• none of the options

Torque will be maximum for a magnet if ________

• its axis is along the direction of external field

• its axis is perpendicular to the external field

• its north pole points in opposite direction of the field

• none of the options

superconductors will behave as __________ materials below transition temperature

• none of the options

• paramagnetic

• ferromagnetic

• diamagnetic

In transformers the hysteresis loss will be ______

• less

• more

• maximum

• zero

In right hand thumb rule the stretched thumb gives the direction of __________

• current

• magnetic moment

• magnetic field

• magnetic force

The force experienced by two parallel current carrying conductors is ___________ if they carry current in __________ direction.

• repulsive, same

• attractive, same

• repulsive, opposite

• attractive, opposite