Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 37

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Weekly Quiz Competition

Question 1
4 / -1

The mass of a particle is 400 times than that an electron and the charge is double. The particle is accelerated by5 V. Initially the particle remained in rest, then its final kinetic energy will be

A
5 eV

B
10 eV

C
100 eV

D
2000 eV

Solution
Question 2
4 / -1

When cathode-rays strike a metal target of high melting point with a very high velocity, then which of the following are produced?

A
α-rays

B
X-rays

C
Ultraviolet rays

D
γ-waves
Question 3
4 / -1

While doing his experiment, Millikan one day observed the following charges on a single drop
(i) 6.563 x 10^–19 C
(ii) 8.204 x 10^–19 C
(iii) 11.50 x 10^–19 C
(iv) 13.13 x 10^–19C
(v) 16.48 x 10^–19 C
(vi) 18.09 x 10^–19 C
From this data the value of the elementary charge (e) was found to be

A
1.641 x 10^–19 C

B
1.630 x 10^–19 C

C
1.648 x 10^–19 C

D
1.602 x 10^–19 C

Solution
Question 4
4 / -1

A
1

B
0

C
g_E /g_m

D
g_m / g_E
Question 5
4 / -1

Vidicon works on the principle of

A
Electrical conductivity

B
Photoconductivity

C
Thermal conductivity

D
SONAR
Question 6
4 / -1

When the speed of electrons increase, then the value of its specific charge

A
Increases

B
Decreases

C
Remains unchanged

D
Increases upto some velocity and then begins to decrease

Solution
Question 7
4 / -1

In an electron gun the control grid is given a negative potential relative to cathode in order to

A
Decelerate electrons

B
Repel electrons and thus to control the number of electrons passing through it

C
To select electrons of same velocity and to converge them along the axis

D
To decrease the kinetic energy of electrons
Question 8
4 / -1

The ratio of momenta of an electron and an a-particle which are accelerated from rest by a potential difference of 100 V is

A
1

B

C

D

Solution
Question 9
4 / -1

When subjected to a transverse electric field, cathode rays move

A
Down the potential gradient

B
Up the potential gradient

C
Along a hyperbolic path

D
Along a circular path
Question 10
4 / -1

The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by

A
Planck

B
J.J. Thomson

C
Einstein

D
Millikan