Kuiz Fizik Tingkatan 5 Bab 6 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 6 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

During beta decay, a neutron in an unstable nucleus transforms. What is the effect on the nucleon number (A) and the proton number (Z) of the nucleus?

Both the nucleon number (A) and the proton number (Z) remain unchanged.

The nucleon number (A) decreases by one, while the proton number (Z) remains the same.

The nucleon number (A) remains the same, while the proton number (Z) increases by one.

The nucleon number (A) decreases by four, and the proton number (Z) decreases by two.

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

1/16

1/8

None

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 releases energy while fusion absorbs energy.

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

None

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

To act as the fuel source for the fission process

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 transfer heat from the reactor core to the steam generator

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 mass of the energy that is released during the reaction

The difference in mass between the reactants and the products

The total mass of the initial nucleus before the reaction begins

The average mass of the nuclei involved in the reaction

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 rate of radioactive decay.

The charge of an electron.

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.

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

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

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?

1/4

1/16

1/2

1/8

None

What is the fundamental process that defines radioactive decay?

A stable nucleus absorbs external energy and becomes unstable.

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

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

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

None

10.

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.

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

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.

None

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