Kuiz Fizik Tingkatan 5 Bab 6 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 6 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

What is the fundamental process that defines radioactive decay?

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

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 stable nucleus absorbs external energy and becomes unstable.

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?

1/4

1/16

1/8

1/2

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

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 charge of an electron.

The rate of radioactive decay.

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

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

To act as the fuel source for the fission process

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

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

To act as the nuclear fuel that undergoes fission.

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 average mass of the nuclei involved in the reaction

The difference in mass between the reactants and the products

The total mass of the initial nucleus before the reaction begins

None

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

A proton and a neutron.

A proton and an electron.

An alpha particle.

Two protons and an electron.

None

10.

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

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