Which scientist discovered natural radioactivity?
Enrico Fermi
Henri Becquerel
Marie Curie
Micheal Faraday
Niels Bohr
Correct answer is B
No explanation has been provided for this answer.
12.5 Nm-2
8.7 Nm-2
8.3 Nm-2
3.8Nm-2
3.0Nm-2
Correct answer is A
No explanation has been provided for this answer.
The invisible part of the spectrum of white light consists of
Infra-red and ultra-violet only
Infra-red, ultra-violet and blue only
red, orange and green only
red and violet only
yellow and indigo only
Correct answer is A
No explanation has been provided for this answer.
All the units are fundamental.
All the units are derived
All the units except one are S.I units
Two of the units are fundamental and one derived.
None of the units is S.I units.
Correct answer is D
No explanation has been provided for this answer.
An electric bell operated within an evacuated bell jar enables us to infer correctly that
light waves require a medium for transmission
sound waves do not require a medium for transmission
light waves do not require a medium for transmission but sound waves do
light waves travel much faster than sound waves
light waves and sound waves travel at the same speed
Correct answer is C
No explanation has been provided for this answer.