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Worksheets

Quantum

Total questions: 25

Worksheet time: 16mins

Name
Class
Date
1.

Which of the following is the characteristic of a black body?

a)

A perfect absorber but an imperfect radiator

b)

A perfect radiator but an imperfect absorber

c)

A perfect radiator and a perfect absorber

d)

A perfect conductor

2.

What is Compton shift?

a)

Shift in frequency

b)

Shift in charges

c)

Shift in radiation

d)

Shift in wavelength

3.

Compton shift depends on which of the following?

a)

Incident radiation

b)

Nature of scattering substance

c)

Angle of scattering

d)

Amplitude of frequency

4.

As the wavelength of the radiation decreases, the intensity of the black body radiations ____________

a)

Increases

b)

Decreases

c)

First increases then decrease

d)

First decreases then increase

5.

During Einstein’s Photoelectric Experiment, what changes are observed when the frequency of the incident radiation is increased?

a)

The value of saturation current increases

b)

No effect

c)

The value of stopping potential increases

d)

The value of stopping potential decreases

6.

What is the time lag between the incidence of photons and the ejection of photoelectrons?

a)

Greater than 10-5 s

b)

Between 10-5 s and 10-9 s

c)

Less than 10-9 s

d)

1 second

7.

How does the intensity affect the photoelectric current?

a)

As intensity increases, the photoelectric effect increases

b)

As the intensity increases, the photoelectric effect decreases

c)

As the intensity decreases, the photoelectric effect becomes twice

d)

No effect

8.

The photoelectric emission could be explained by the ____________

a)

Wave nature of light

b)

Particle nature of light

c)

Dual nature of light

d)

Quantum nature

9.

The work function of lithium is 2.5 eV. The maximum wavelength of light that can cause the photoelectric effect in lithium is ______________

a)

3980 Å

b)

4980 Å

c)

5980 Å

d)

6980 Å

10.

The Kinetic energy of a photoelectron emitted on shining a light of wavelength 6.2 X 10-6 m on a metal surface of work function 0.1 eV is _________________

a)

0.01 eV

b)

0.02 eV

c)

0.1 eV

d)

1 eV

11.

For Pair Production phenomenon to occur the photon must have energy, greater than or equal to ______________

a)

0.51 MeV

b)

1.02 MeV

c)

0.32 MeV

d)

0.85 MeV

12.

What kind of photon is required for the pair production phenomenon to occur?

a)

Visible Light Photon

b)

X-ray Photon

c)

γ-ray Photon

d)

UV Photon

13.

Charge and momentum are conserved in Pair Production

a)

True

b)

False

14.

Which of the following is the correct expression for the Schrödinger wave function?

a)

idΨdt=−iℏ2m∂Ψ∂x+UΨ

b)

idΨdt=−iℏ2m∂2Ψ∂x2+UΨ

c)

idΨdt=−iz2m∂Ψpartialx+UΨ

d)

idΨdt=−iz2m∂2Ψ∂x2+UΨ

15.

For a quantum wave particle, E = _____________

a)

ℏ k

b)

ℏ ω

c)

ℏ ω/2

d)

ℏ k/2

16.

Which of the following is not a characteristic of wave function?

a)

Continuous

b)

Single valued

c)

Differentiable

d)

Physically Significant

17.

Any wave function can be written as a linear combination of _________________

a)

Eigen Vectors

b)

Eigen Values

c)

Eigen Functions

d)

Operators

18.

The Schrodinger wave equation is _______

a)

Linear

b)

Quadratic

c)

Differential equation

d)

Derivable

19.

If Ψ1 and Ψ2 are two solutions of Schrodinger Wave equation then which of the following is also a solution?

a)

Ψ12

b)

Ψ1Ψ2

c)

Ψ21

d)

Ψ1 + Ψ2

20.

The expectation value of which measurement cannot be calculated using the typical method?

a)

Energy

b)

Speed

c)

Position

d)

Momentum

21.

Any restrictions present on the particle’s motion in a Schrodinger Equation would affect the ___________

a)

Ψ

b)

dΨ/dt

c)

d2Ψ/dx2

d)

U

22.

The values of Energy for which Schrodinger’s steady state equation can be solved is called as _____________

a)

Eigen Vectors

b)

Eigen Values

c)

Eigen Functions

d)

Operators

23.

Which quantity is said to be degenerate when HΨn = EnΨn?

a)

Eigen Vectors

b)

Eigen Values

c)

Eigen Functions

d)

Operators

24.

The expectation value of which measurement cannot be calculated using the typical method?

a)

Energy

b)

Speed

c)

Position

d)

momemtum

25.

The Schrödinger is a differential equation.

a)

True

b)

False