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 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

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

1/16

1/8

1/4

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

To act as the nuclear fuel that undergoes fission.

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

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

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?

1/16

1/8

1/4

1/2

None

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

An alpha particle.

A proton and an electron.

Two protons and an electron.

A proton and a neutron.

None

What is the fundamental process that defines radioactive decay?

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.

A stable nucleus absorbs external energy and becomes unstable.

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

None

Which statement correctly distinguishes nuclear fission from nuclear fusion?

Fission releases energy while fusion absorbs energy.

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

Fission involves uranium, while fusion involves lead.

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

None

What happens to the atomic nucleus during gamma decay?

It emits two protons and two neutrons.

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

A neutron transforms into a proton and an electron.

It splits into two smaller nuclei.

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?

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

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

None

1 out of 10