Physics
Super conductors are substances that

Conduct electricity at high temperature
Conduct electricity at low temperature
Offer minimum resistance to flow of electric current
Offer high resistance to the flow of electric current

ANSWER DOWNLOAD EXAMIANS APP

Physics
Absolute Zero is defined as

At which liquid Helium boils
At which the volume becomes zero
The temperature at which all molecular motion ceases
At which water boils at 298K

ANSWER DOWNLOAD EXAMIANS APP

Physics
The sky appears blue because

The atmosphere scatters blue colour more than the others
All colours interfere to produce blue
In white light, the blue component dominates
It is actually blue

ANSWER DOWNLOAD EXAMIANS APP