اختبار الكتروني وحدة Energy

1
The transparent and translucent objects have the same color of ……..
2
we wear white clothes in summer season to …….
3
When white light falls on an orange translucent box , ……..
4
The white clothes appear white when white light falls on them, because ………..
5
the blachboard …….when White lights falls on it
6
all the following divices have an electromagnet inside them except the ….
7
when the compass is put beside a wire carrying an electric current ………………
8
the magnetic force of the electromagnet increases by….
9
the magnetic force of the electromagnet will be lost by……
10
magnetic effect of the electric current can be detected by using …..
11
the most attraction force of the magnet exists ………
12
the natural magnet is made of one of iron ores called …….
13
the magnet has ……….poles
14
the similar magnetic poles ……….each other
15
magnets are divided into ……. Types