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 act as the nuclear fuel that undergoes fission.

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

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

None

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

To transfer heat from the reactor core to the steam generator

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

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

To act as the fuel source for the fission process

None

Which of the following describes a nuclear chain reaction?

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

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

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

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

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 short half-life, allowing for precise measurements.

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

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

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

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 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

The difference in mass between the reactants and the products

None

What happens to the atomic nucleus during gamma decay?

A neutron transforms into a proton and an electron.

It emits two protons and two neutrons.

It splits into two smaller nuclei.

It transitions from a higher energy state to a lower energy state without changing its composition.

None

What is the fundamental process that defines radioactive decay?

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

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

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

A stable nucleus absorbs external energy and becomes unstable.

None

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

The mass of a carbon-12 atom.

The speed of light in a vacuum.

The charge of an electron.

The rate of radioactive decay.

None

A radioactive substance has a half-life of 15 minutes. If you start with a sample of this substance, what fraction of the original radioactive nuclei will remain undecayed after one hour?

1/2

1/4

1/8

1/16

None

10.

Which statement correctly distinguishes nuclear fission from nuclear fusion?

Fission involves uranium, while fusion involves lead.

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

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

Fission releases energy while fusion absorbs energy.

None

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