MEDIUM
8th CBSE
IMPORTANT
Earn 100

Explain in brief about seismograph. Also, draw a labelled diagram of a seismograph.


Important Questions on Some Natural Phenomena

EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Practice>Q 2
The like charges 
MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Practice>Q 3
Lightning occurs due to
EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Practice>Q 4
Electric current is to be passed from one body to another. For this purpose, the two bodies must be joined by
EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Practice>Q 5
Sparks can be seen on the electric poles, due to which wire becomes :
EASY
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Practice>Q 6
The charge acquired by the glass rod when it is rubbed with a silk cloth is 
MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Test>Q 19

A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woolen cloth. Out of glass rod, inflated rubber, silk cloth and woolen cloth:

Mention the name of two objects acquires a negative charge. Why?

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Test>Q 19

A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woolen cloth. Out of glass rod, inflated rubber, silk cloth and woolen cloth:

Mention the name of two objects acquires a positive charge. Why?

MEDIUM
8th CBSE
IMPORTANT
All in One - SCIENCE CBSE Class 8>Chapter 15 - Some Natural Phenomena>Chapter Test>Q 20

We should use mobile phones rather than landline phones during a thunderstorm. Give reasons.