Physics
A nuclear reactor is said to have become 'critical' when

It stops due to malfunctioning
It is ready to produce controlled energy
It starts emitting dangerous radioactive radiations
It is shut down to avoid explosion

ANSWER DOWNLOAD EXAMIANS APP

Physics
Which of the following occurred first ?

Max Planck unveiled the Quantum Theory
Guglielmo Marconi sent out the first wireless signals
Wright Brothers successfully flew an aircraft
Albert Einstein propounded the General Theory of Relativity

ANSWER DOWNLOAD EXAMIANS APP