MCQ
When we remove polyester or woollen clothes in dark, we can see a spark and hear a crackling sound. Which of the following is responsible for it?
- AStatic electricity.
- BCurrent electricity.
- CReflection of light.
- DRefraction of light.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In the following diagram if V2 > V1 then

|
(a) |
(b) |
(c) |
(d) |
A planet of mass m moves in an ellipse around the sun of mass so that its maximum and minimum distances are
and
respectively. The angular momentum of the planet relative to the centre of the sun is
|
(a) |
(b) |
(c) |
(d) |