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Worksheets26.1 Electromagnetic Forces ม5
Total questions: 10
Worksheet time: 3mins
Name
Class
Date
1.
What is an isotope?
a)
A charged atom
b)
An atom with different amounts of neutrons
c)
An atom with different amounts of protons
d)
A neutral atom
2.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
3.
What did jj thomson discover
a)
proton
b)
nucleus
c)
electron
d)
neutron
4.
Which layer of Earth is composed mainly of liquid iron and nickel? (This layer creates Earth's
magnetic field, which protects Earth from solar wind.)
a)
crust
b)
mantle
c)
outer core
d)
inner core
5.
In a magnetic field, the ratio of an electron’s charge to its mass is equal to the ratio of the electron’s velocity divided by the product of the magnetic field strength and the radius of the electron’s _______ path.
a)
Linear
b)
Circular
c)
Straight
d)
opposite
6.
He first measured the mass and charge of an electron using the oil drop experiment.
a)
Joseph Thomson
b)
Robert Millikan
c)
John Dalton
d)
Niels Bohr
7.
The charge of an electron in coulombs is?
a)
9.11 x 1019
b)
1.502 x 10-19
c)
1.702 x 1019
d)
1.602 x 10-19
8.
The value in kg of the mass of an electron is?
a)
1.602 x 10-19
b)
9.11 x 10-19
c)
9.11 x 10-31
d)
9.11 x 1031
9.
What do the peaks on the mass spectrum represent?
a)
anions
b)
different isotopes
c)
atoms with differing numbers of electrons
d)
numbers of electrons
10.
What is the purpose of beam of high energy electrons used in the mass spectrometer
a)
To ionize atoms
b)
To accelerate ions
c)
To deflect ions
d)
To detect ions
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