Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 75

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Weekly Quiz Competition

Question 1
4 / -1

Electron volt is a unit of

A
Potential

B
Charge

C
Power

D
Energy
Question 2
4 / -1

Which of the following is not the property of a cathode ray?

A
It casts shadow

B
It produces heating effect

C
It produces fluroscence

D
It does not deflect in electric field
Question 3
4 / -1

In Bainbridge mass spectrograph a potential difference of 1000 V is applied between two plates distant 1 cm apart and magnetic field B =1 T. The velocity of undeflected positive ions in m/s from the velocity selector is

A
10⁷ m/s

B
10⁴m/s

C
10⁵ m/s

D
10² m/s

Solution
Question 4
4 / -1

An electron is accelerated through a p.d. of 45.5 volt. The velocity acquired by it is (in ms^–1)

A
4 × 10⁶

B
4 × 10⁴

C
10⁶

D
Zero

Solution
Question 5
4 / -1

A cathode emits 1.8 × 10¹⁴ electrons per second, whenheated. When 400 V is applied to anode all the emitted electrons reach the anode. The charge on electron is 1.6 × 10^–19 C. The maximum anode current is

A
2.7 µA

B
29µA

C
72 µA

D
29 mA

Solution
Question 6
4 / -1

Order of q/m ratio of proton, α–particle and electron is

A
e > p > a

B
p > a > e

C
e > a > p

D
None of these

Solution
Question 7
4 / -1

An electron initially at rest, is accelerated through a potential difference of 200 volt, so that it acquires a velocity 8.4 × 10⁶ m/s. The value of e/m of electron will be

A
2.76 × 10¹² C/kg

B
1.76 × 10¹¹ C/kg

C
0.76 × 10¹² C/kg

D
None of these

Solution
Question 8
4 / -1

An oil drop carrying a charge q has a mass m kg. It is falling freely in air with terminal speed v. The electric field required to make the drop more upwards with thesame speed is

A

B

C

D

Solution
Question 9
4 / -1

Positive rays consists of

A
Electrons

B
Neutrons

C
Positive ions

D
Electro magnetic waves
Question 10
4 / -1

O⁺⁺,C⁺, He⁺⁺and H⁺ ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest

A
O⁺⁺

B
C⁺

C
He⁺⁺

D

Solution