Worksheetsnuclear physics
Total questions: 22
Worksheet time: 24mins
___________ is a process where an unstable nucleus becomes a more stable nucleus by emitting radioactive radiation
radioactive decay
half-life
nuclear fission
nuclear fusion
Which of the following is NOT in type of radioactive radiation?
Alpha decay ( α -decay)
Beta decay ( β -decay)
Gamma ray ( γ -ray)
X-ray
Thorium-232 decays and emits gamma ray. which of the following is true about gamma ray?
I. Gamma ray is type of electromagnetic wave
II. Gamma ray is neutral
III. Gamma ray does not have energy
I. and II.
I. and III.
II. and III.
Nuclear power stations are built near the sea because _______
of the cooler surroundings
water is used as a nuclear fuel
a lot of water is used as coolant for the reactors
more electricity can be generated
Radioactive material X has a half-life of 5 days. What is the number of days taken for the activity of X to reduce to 12.5% of its initial activity?
5 days
10 days
15 days
20 days
A sample of radioactive material has an initial activity of 240 s-1 . If its half-life is 30 minutes, how much is its activity after 2 hours?
15 s-1
30 s-1
60 s-1
120 s-1
Nuclear energy is energy released from a ______ during nuclear reactions
fast-moving proton
fast-moving neutron
fast-moving electron
nucleus
The amount of energy released from nuclear fission depends on the
I. critical mass
II. speed of light in vacuum
III. mass deficit
I. and II. only
I. and III. only
II. and III. only
All the answer is correct
The walls of a nuclear reactor are made of ______
iron
concrete
copper
carbon
________ is a nuclear reaction in which a heavy nucleus is split into two or more smaller and lighter nuclei after being bombarded by fast-moving neutron.
Radiaactive decay
Nuclear fission
Nuclear fusion
half-life
In a nuclear fission,the mass of 0.005 a.m.u has been converted to nuclear energy.Calculate the energy released.
[1 a.m.u = 1.7 x 10−27 kg, the velocity of light = 3.0 x 108 m s−1 ]
2.55 x 10−21 J
5.10 x 10−19 J
3.83 x 10−13 J
7.65 x 10−13 J
In a nuclear reactor , the function of control rods is
to control the quantity of uranium
to act as a shield
to cool the reactor
to absorb excess neutrons
In a nuclear reactor , the function of graphites is
to control the rate of reaction
to absorb excess neutrons
to acts as a shield
to hasten the neutrons
In a nuclear process , several atomic nuclei combine together to form a larger nucleus ,followed by the release of energy . Name the process.
Radioactive decay
Nuclear fusion
Nuclear fission
Chain reaction
Most power plants are built near the river or an abundant water source.
Why ?
Water has the capability to absorb unwanted radiation.
So that nuclear waste is easily dumped into the river
Water is used to produce steam to run the turbine
Uranium can be found in the most water source
The reaction for a nuclear fusion can only happen under what conditions?
Tindak balas bagi pelakuran nuklear hanya boleh berlaku dalam apa jenis keadaan?
Extremely high temperatures
Suhu yang amat tinggi
Extremely high pressure
Tekanan yang amat tinggi
Absolute zero
Sifar mutlak
Extremely high speeds
Kelajuan yang amat tinggi
calculate mass defect
hitung cacat jisim
[1 a.m.u. = 1.66 x 10-27 kg]
1.033×10−29kg
1.330×10−29kg
0.0171 kg
1.71×102 kg
diagram shows a reactor nuclear. How control rod function in order to the rate nuclear raection?
Gambarajah menunjukkan reaktor nuklear. Bagaimana rod pengawal berfungsi dalam mengawal kadar tindak balas nuklear?
by absorbing excess heat
dengan menyerap lebihan haba
by absorbing excess neutrons
dengan menyerap lebihan neutron
by slowing down the speed of neutron
dengan memperlahankan laju neutron
by releasing water
dengan melepaskan air
diagram shows a reactor nuclear. How moderator function in order to the rate nuclear raection?
Gambarajah menunjukkan reaktor nuklear. Bagaimana moderator berfungsi dalam mengawal kadar tindak balas nuklear?
by absorbing excess heat
dengan menyerap lebihan haba
by absorbing excess neutrons
dengan menyerap lebihan neutron
by slowing down the speed of neutron
dengan memperlahankan laju neutron
by releasing water
dengan melepaskan air
“The time taken for a sample of radioactive nuclei to decay to half of its initial number.” The following statement refers to
“Masa yang diambil untuk separuh daripada bilangan asal nukleus radioaktif bagi suatu sampel radioaktif mereput.” Pernyataan berikut merujuk kepada
Semi life
Setengah hayat
Half life
Separuh hayat
Radioactive decay
Reputan radioaktif
Radioactivity
Keradioaktifan
how many alpha particle released in this process?
Berapakah bilangan zarah alfa yang dibebaskan dari process ini?
1
2
4
6
how many alpha and beta particle released in this process?
Berapakah bilangan zarah alfa dan beta yang dibebaskan dari process ini?
4 alpha particles and 2 beta particles
4 zarah alfa dan 2 zarah beta
6 alpha particles and 2 beta particles
4 zarah alfa dan 2 zarah beta
6 alpha particles and 4 beta particles
4 zarah alfa dan 2 zarah beta
4 alpha particles and 6 beta particles
4 zarah alfa dan 2 zarah beta
