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 within the nucleus is transformed. What are the products of this transformation?

Two protons and an electron.

An alpha particle.

A proton and a neutron.

A proton and an electron.

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?

1/8

1/16

1/2

1/4

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.

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

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

None

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?

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

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

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

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

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.

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.

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

None

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

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

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.

None

Which statement correctly distinguishes nuclear fission from nuclear fusion?

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.

Fission releases energy while fusion absorbs energy.

None

What happens to the atomic nucleus during gamma decay?

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

It emits two protons and two neutrons.

A neutron transforms into a proton and an electron.

It splits into two smaller nuclei.

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?

1/2

1/8

1/16

1/4

None

10.

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 average mass of the nuclei involved in the reaction

The total mass of the initial nucleus before the reaction begins

The difference in mass between the reactants and the products

None

1 out of 10