Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 17

Score
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Weekly Quiz Competition

Question 1
4 / -1

50% of X – rays obtained from a Coolidge tube pass through 0.3 mm thick aluminium foil. If the potential difference between the target and the cathode is increased, then the fraction of X – rays passing through the same foil will be

A
50%

B
> 50%

C
< 50%

D
not sure
Question 2
4 / -1

Stopping potential for photoelectrons

A
does not depend on the frequency of the incident light

B
does not depend upon the nature of the cathode material

C
depends on both the frequency of the incident light and the nature of cathode material

D
depends upon the intensity of the incident light.
Question 3
4 / -1

Which of the following electromagnetic waves has minimum frequency ?

A
Radio wave

B
Ultrasonic wave

C
Microwave wave

D
Audiable wave
Question 4
4 / -1

On increasing the number of electrons striking the anode of an X – ray tube, which one of the following parameters of the resulting X – rays would increase

A
penetration power

B
frequency

C
wavelength

D
intensity
Question 5
4 / -1

A electron states from rest in an electric field and acquires a speed u in reaching a point A. The potential difference between the starting point and the point A is V_A, then

A

B

C

D

Solution
Question 6
4 / -1

When a proton is accelerated through 1 V, then its kinetic energy will be

A
1840 eV

B
13.6 eV

C
1 eV

D
0.54 eV

Solution
Question 7
4 / -1

The slope of frequency of incident light and stopping potential for a given surface will be

A
h

B
h/e

C
eh

D
e

Solution
Question 8
4 / -1

Proton and α − particle have the same de – Broglie wavelength. What is the same for both of them ?

A
Time period

B
Energy

C
Frequency

D
Momentum

Solution
Question 9
4 / -1

Which of the following is not the property of cathode rays:

A
It produces the heating effect

B
It does not deflect in electric field

C
It casts shadow

D
It produces fluorescence
Question 10
4 / -1

The frequency and work function of an incident photon are υ φ and 0. If v₀ is the threshold frequency, then necessary condition for the emission of photoelectron is

A
v < v₀

B
v = v₀/2

C
v ≥ v₀

D
none of these