Kuiz Fizik Tingkatan 5 Bab 6 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 6 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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

The total mass of the initial nucleus before the reaction begins

The average mass of the nuclei involved in the reaction

The mass of the energy that is released during the reaction

The difference in mass between the reactants and the products

None

What is the fundamental process that defines radioactive decay?

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

A stable nucleus absorbs external energy and becomes unstable.

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

In the equation E=mc2, what does the 'c' represent?

The charge of an electron.

The rate of radioactive decay.

The speed of light in a vacuum.

The mass of a carbon-12 atom.

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 act as the nuclear fuel that undergoes fission.

To transfer heat from the reactor core to the steam generator.

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

None

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

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

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 fuel source for the fission process

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 an electron.

A proton and a neutron.

An alpha particle.

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?

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 short half-life, allowing for precise measurements.

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

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

What happens to the atomic nucleus during gamma decay?

It emits two protons and two neutrons.

It splits into two smaller nuclei.

A neutron transforms into a proton and an electron.

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

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?

1/16

1/2

1/8

1/4

None

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