Physics
The swing of a spinning cricket ball in air can be explained on the basis of

Buoyancy of air.
Sudden change in wind direction.
Turbulence caused by wind.
Bernoulli's theorem.

ANSWER DOWNLOAD EXAMIANS APP

Physics
Superconductors are those elements

Whose resistance falls almost to zero at very low temperatures
Which turn into insulators at very low temperatures
Which conduct electricity only at super-high temperatures
Whose conductivity is intermediate between metals and insulators

ANSWER DOWNLOAD EXAMIANS APP