Kuiz Fizik Tingkatan 5 Bab 6 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 6 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

In the context of a nuclear reactor, what is the primary function of control rods made of boron or cadmium?

To transfer heat from the reactor core to the steam generator.

To absorb excess neutrons and regulate the rate of the chain reaction.

To act as the nuclear fuel that undergoes fission.

To slow down fast-moving neutrons to increase the probability of fission.

None

In the equation E=mc2, what does the 'c' represent?

The speed of light in a vacuum.

The mass of a carbon-12 atom.

The rate of radioactive decay.

The charge of an electron.

None

If a sample of a radioactive isotope has a half-life of 20 days, what fraction of the original sample will remain undecayed after 60 days?

1/8

1/4

1/16

1/2

None

Why is the method of dating rocks using the Uranium-238 to Lead-206 decay series effective for estimating the age of the Earth?

Uranium-238 has a very long half-life, comparable to the age of the Earth.

Uranium-238 has a very short half-life, allowing for precise measurements.

The decay process is heavily influenced by temperature and pressure within the Earth’s crust.

Lead-206 is a highly radioactive element that decays quickly.

None

According to Albert Einstein's equation E=mc2 , the 'm' represents the mass defect. What is the mass defect in a nuclear reaction?

The difference in mass between the reactants and the products

The total mass of the initial nucleus before the reaction begins

The mass of the energy that is released during the reaction

The average mass of the nuclei involved in the reaction

None

Which statement correctly distinguishes nuclear fission from nuclear fusion?

Fission releases energy while fusion absorbs energy.

Fission is the splitting of a heavy nucleus, while fusion is the combining of light nuclei.

Fission involves uranium, while fusion involves lead.

Fission occurs naturally in the Sun, while fusion is used in nuclear power plants.

None

Which of the following describes a nuclear chain reaction?

A series of alpha and beta decays that occur until a stable nucleus is formed.

A self-sustaining process where neutrons released in one fission event trigger further fission events.

The fusion of multiple hydrogen nuclei in a sequential manner within a star.

A chemical reaction where the products catalyze the next stage of the reaction.

None

What is the primary function of control rods, made of materials like boron or cadmium, inside a nuclear reactor?

To absorb excess neutrons to regulate the rate of the chain reaction.

To act as the fuel source for the fission process

To slow down fast-moving neutrons to increase the probability of fission.

To transfer heat from the reactor core to the steam generator

None

What is the fundamental process that defines radioactive decay?

Two light nuclei combine under high pressure to form a heavier nucleus.

A stable nucleus absorbs external energy and becomes unstable.

A heavy nucleus splits into two or more lighter nuclei when struck by a neutron.

An unstable nucleus transforms into a more stable one by emitting radiation.

None

10.

During beta decay, a neutron within the nucleus is transformed. What are the products of this transformation?

An alpha particle.

Two protons and an electron.

A proton and a neutron.

A proton and an electron.

None

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