Kuiz Fizik Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 7 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

Which of the following applications directly uses the photoelectric effect to generate an electric current from light?

Lasers

Solar cells

Electric bells

Electron microscopes

None

A key feature of the photoelectric effect is that photoelectrons are emitted almost instantaneously when light shines on the metal (if f>f 0). Why did this observation conflict with classical wave theory?

Classical theory predicted that it would take time for an electron to absorb enough energy from a continuous wave to be ejected.

Classical theory predicted that only very high-frequency light could ever cause emission.

Classical theory predicted that electrons would be emitted randomly, not instantaneously.

Classical theory predicted that no electrons would be emitted at all.

None

Albert Einstein expanded on Max Planck's quantum theory by proposing that light itself exists in discrete packets of energy. What are these packets called?

Photons

Corpuscles

Quanta

Electrons

None

What is the 'work function' (W) in the context of the photoelectric effect?

The minimum energy required to release an electron from a metal surface.

The frequency of the incident light.

The total energy of the incident photon.

The kinetic energy of the emitted electron

None

Which of these scientists is credited with conducting the double-slit experiment in 1801, demonstrating that light behaves as a wave?

J. J. Thomson

Max Planck

Isaac Newton

Thomas Young

None

According to the relationship E=hf, if the frequency of a light wave is doubled, what happens to the energy of a single photon of that light?

It remains the same.

It is quadrupled

It is halved

It is doubled

None

The concept of wave-particle duality, introduced by Louis de Broglie, suggests that:

All particles can exhibit wave-like characteristics.

Light behaves only as a wave, and particles like electrons behave only as particles.

Wave properties and particle properties are mutually exclusive and can never be observed for the same entity.

Only massless entities like photons can exhibit both wave and particle properties.

None

Why does a 'threshold frequency' exist for the photoelectric effect?

Because the incoming photon must have enough energy to overcome the metal’s work function.

Because classical wave theory predicts a time delay for low frequencies.

Because electrons can only absorb energy in discrete packets.

Because the intensity of the light is not high enough.

None

How does Niels Bohr's model of the atom explain the production of line spectra?

Electrons can orbit the nucleus at any distance with any energy.

Electrons continuously radiate energy as they orbit the nucleus.

Photons are emitted when electrons transition between discrete energy levels.

The nucleus of the atom emits photons when it is excited.

None

10.

Einstein's photoelectric equation is given by hf=W+K max . What does this equation represent?

The law of conservation of energy for the photoelectric effect.

The creation of energy from a photon.

The quantization of atomic energy levels.

The relationship between a particle’s momentum and its wavelength.

None

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