Chapter 15: Some Natural Phenomena

1.An electroscope is a device which is used to find if an object is
(a)charged        
(b)magnetic  (c)free of cracks  (d)hot
2.Electric current is to be passed from one body to another. For this purpose the two bodies must be joined by
(a)cotton thread   (b)plastic string   (c)copper wire  (d)rubber band
3.The movement of the earth’s plates causes
(a)cyclones   (b)lightning  (c)earthquakes (d)thunderstorms
4.Two charged objects are brought close to each other. Choose the most appropriate statement from the following options:
(a)they may attract
(b)they may repel
(c)they may attract or repel depending on the type of charges they carry
(d)there will be no effect