Which of the following statements is Not true about atoms?
Atom of different elements have different atomic weights
The mass of an atom is concentrated in the nucleus
An atom is made up of a nucleus and number of electrons
Atoms of all elements are identical
Correct answer is D
No explanation has been provided for this answer.
In the diagram above, the direction of the force between N and S in the magnetic field is
MP
SN
NS
PM
Correct answer is C
No explanation has been provided for this answer.
From the diagram above, the measuring accuracy of the micrometer screw gauge is
4.78mm
4.16mm
4.66mm
4.70mm
Correct answer is B
No explanation has been provided for this answer.
In the diagram above, the neutral point is at
R
X
S
P
Correct answer is B
No explanation has been provided for this answer.
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