When an electric current travels through a wire twisted around an iron nail, the nail becomes an '' (a)   ''

the basic idea of the electric generators is changing of '' ...... '' into "......."

(a)  

The magnetic force is most powerful at the " (a)   " of the magnet

the idea of making camera depend on " (a)   "

" (a)   "is a darkened area which is formed when light falls on an opaque objects.

When the reflected surface is smooth the reflection is " (a)   "

" ........."reflects its own color only, while " ........." passes its

own color only

(a)  

Each magnet has a space in which its magnetic force appears called " (a)   "

Like poles "………. " Each other while unlike poles ""……… each other.

(a)  

A huge electric generator is used in "…………….." Stations

(a)  

Give reason

In dynamo, we use a strong magnet and increase the number of turns in the moving coils.

Give reason

When an electric current flows through a wire that is put beside a compass, the compass needle deflects

What happen and say why

You suspend a bar of magnet to move freely

Give reason

We must wear white clothes in summer. " ... "

Give reason We must wear white clothes in summer.