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 rate of radioactive decay.

The charge of an electron.

The speed of light in a vacuum.

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

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

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

1/2

1/16

1/8

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?

1/16

1/4

1/2

1/8

None

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

A proton and an electron.

An alpha particle.

Two protons and an electron.

A proton and a neutron.

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 total mass of the initial nucleus before the reaction begins

The difference in mass between the reactants and the products

The average mass of the nuclei involved in the reaction

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

To act as the nuclear fuel that undergoes fission.

None

10.

Why is the method of dating rocks using the Uranium-238 to Lead-206 decay series effective for estimating the age of the Earth?

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 short half-life, allowing for precise measurements.

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

None

1 out of 10