GP2_QuizNo2_Magnetic Fields & Magnetic Force

A magnet attracts ______________.

• all metals     

• iron, zinc, and tin

• iron, cobalt, and nickel

• paper, wood, cork

The strength of a magnet is _____________.

• greatest in the middle

• greatest at the poles

• the same all over

• greatest at only one end

A magnet can be made by _______________.

• heating an iron nail    

• rubbing an iron nail with a magnet

• placing an iron nail in the earth

• striking an iron nail

When a bar magnet is broken in half, _____________.

• it loses its magnetism

• both halves are magnets

• one half has one pole and the other half has another pole

• one half has two south poles and the other half has two north poles

Magnets lose their magnetism when they are ____________.

• heated

• cooled

• put in water

• broken into pieces

All magnets are characterized with _____________.

• two south poles

• a shape like a bar

• permanent magnetism

• a magnetic field around them

The total magnetic flux through a closed surface is _____________.

• always maximum

• dependent on the size of the closed surface

• infinite

• zero

A compass points to _____________.

• magnetic north

• geographic east

• geographic north

• magnetic east

The motion of a charged particle under the action of a magnetic field alone is always motion with ______________.

• constant force

• constant speed

• constant velocity

• constant acceleration

The magnetic force on a current-carrying conductor depends on the following EXCEPT

• current flowing in the conductor

• length of the conductor

• mass of the conductor

• magnetic field