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 charge of an electron.

The rate of radioactive decay.

The mass of a carbon-12 atom.

The speed of light in a vacuum.

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.

It splits into two smaller nuclei.

A neutron transforms into a proton and an electron.

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.

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

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

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

None

Which statement correctly distinguishes nuclear fission from nuclear fusion?

Fission involves uranium, while fusion involves lead.

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

Fission releases energy while fusion absorbs energy.

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

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

1/8

1/2

None

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

Two protons and an electron.

A proton and a neutron.

A proton and an electron.

An alpha particle.

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

According to Albert Einstein's equation E=mc2 , the 'm' represents the mass defect. What is the mass defect in a nuclear reaction?

The difference in mass between the reactants and the products

The mass of the energy that is released during the reaction

The total mass of the initial nucleus before the reaction begins

The average mass of the nuclei involved in the reaction

None

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

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

To act as the fuel source for the fission process

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

To transfer heat from the reactor core to the steam generator

None

10.

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

1/2

1/8

None

1 out of 10