Dual Nature of Radiation and Matter Test

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Dual Nature of Radiation and Matter Test - 38

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Weekly Quiz Competition

Question 1
4 / -1

The charge on electron was discovered by

A
J.J. Thomson

B
Neil Bohr

C
Millikan

D
Chadwick
Question 2
4 / -1

From the following, what charges can be present on oil drops in Millikan\'s experiment

A
Zero, equal to the magnitude of charge on α-particle

B
1.6 ×10^–18 C

C
1.6 × 10^–19 C, 2.5 e

D
1.5 e, e (Here e is the electronic charge)

Solution
Question 3
4 / -1

In Thomson's method of determining elm of electrons

A
Electric and magnetic fields are parallel to electrons beam

B
Electric and magnetic fields are parallel to each other and perpendicular to electrons beam

C
Magnetic field is parallel to the electrons beam

D
Electric field is parallel to the electrons beam
Question 4
4 / -1

Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be

A
Straight line

B
Circle

C
Parabolic

D
Ellipse
Question 5
4 / -1

The specific charge of an electron is

A
1.6 × 10^–19 coulomb

B
4.8 × 10^–10 stat coulomb

C
1.76 × 10¹¹ coulomb/kg

D
1.76 × 10^–11 coulomb/kg

Solution
Question 6
4 / -1

An electron is moving with constant velocity along x-axis. If a uniform electric field is applied along y-axis, then its path in the x-y plane will be

A
A straight line

B
A circle

C
A parabola

D
An ellipse
Question 7
4 / -1

Cathode rays are similar to visible light rays as

A
They both can be deflected by electric and magnetic fields

B
They both have a definite magnitude of wavelength

C
They both can ionise a gas through which they pass

D
They both can expose a photographic plate
Question 8
4 / -1

Which of the following devices makes use of the electrons to strike certain substances to produce fluorescence?

A
Thermionic valve

B
Photoelectric cell

C
Cathode ray oscilloscope

D
Electron gun
Question 9
4 / -1

An oxide coated filament is useful in vacuum tubes because essentially

A
It has high melting point

B
It can with stand high temperatures

C
It has good mechanical strength

D
It can emit electrons at relatively lower temperatures
Question 10
4 / -1

Gases begin to conduct electricity at low pressure because

A
At low pressure, gases turn to plasma

B
Colliding electrons can acquire higher kinetic energy due to increased mean free path leading to ionisation of atoms

C
Atoms break up into electrons and protons

D
The electrons in atoms can move freely at low pressure

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Dual Nature of Radiation and Matter Test - 38

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Dual Nature of Radiation and Matter Test - 38

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Question 1

J.J. Thomson

Neil Bohr

Millikan

Chadwick

Question 2

Zero, equal to the magnitude of charge on α-particle

1.6 ×10–18 C

1.6 × 10–19 C, 2.5 e

1.5 e, e (Here e is the electronic charge)

Solution

Question 3

Electric and magnetic fields are parallel to electrons beam

Electric and magnetic fields are parallel to each other and perpendicular to electrons beam

Magnetic field is parallel to the electrons beam

Electric field is parallel to the electrons beam

Question 4

Straight line

Circle

Parabolic

Ellipse

Question 5

1.6 × 10–19 coulomb

4.8 × 10–10 stat coulomb

1.76 × 1011 coulomb/kg

1.76 × 10–11 coulomb/kg

Solution

Question 6

A straight line

A circle

A parabola

An ellipse

Question 7

They both can be deflected by electric and magnetic fields

They both have a definite magnitude of wavelength

They both can ionise a gas through which they pass

They both can expose a photographic plate

Question 8

Thermionic valve

Photoelectric cell

Cathode ray oscilloscope

Electron gun

Question 9

It has high melting point

It can with stand high temperatures

It has good mechanical strength

It can emit electrons at relatively lower temperatures

Question 10

At low pressure, gases turn to plasma

Colliding electrons can acquire higher kinetic energy due to increased mean free path leading to ionisation of atoms

Atoms break up into electrons and protons

The electrons in atoms can move freely at low pressure

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1.6 ×10^–18 C

1.6 × 10^–19 C, 2.5 e

1.6 × 10^–19 coulomb

4.8 × 10^–10 stat coulomb

1.76 × 10¹¹ coulomb/kg

1.76 × 10^–11 coulomb/kg