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commutator
anemometer
ammeter
voltmeter
A chronometer measures
Nautical mile is a unit of distance used in
Knot is a unit of speed of which of the following
Which is the used as a moderator in nuclear reactor
Which among the following is a positively charged particle emitted by a radioactive element
Atoms are composed of
In an atomic explosion, enormous energy is released which is due to
Isotopes are separated by
The wavelength of X-rays is of the order of
Mesons are found in
