Atoms Test

Result

Atoms Test - 13

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Weekly Quiz Competition

Question 1
1 / -0

Match the following :
List - 1 List - 2
a) Burning candle e) line spectrum
b) Sodium vapour f) continuous spectrum
c) Bunsen flame g) bond spectrum
g) Dark lines in solar spectrum h) Absorption spectrum

A
a-g, b-e, c-f, d- h

B
a- g, b-f, c-e, d-h

C
a-f, b-g, c-e, d-h

D
a-f, b-e, c-g, d-h

Solution

A candle emit light which is when dispersed shows continuous spectrum.

Sodium vapour emits light of wavelengths 589 nm and 589.6 nm when electrical discharge is passed through it, so it shows line spectrum.

Bunsen flame shows bond spectrum.

Dark lines in solar spectrum are absorption spectrum as observed by Fraunhofer.
Question 2
1 / -0

An incandescent filament emits a spectrum which is :

A
line spectrum

B
band spectrum

C
continuous spectrum

D
characteristic spectrum

Solution

An electric bulb, a candle or a red hot iron piece emits light, which has continuously varying wavelengths.
So it shows continuous emission spectrum.
Question 3
1 / -0

The photoelectric effect proves that light consists of:

A
Photons

B
Electrons

C
Electromagnetic waves

D
Mechanical waves

Solution

Photoelectric effect is the phenomenon which explains the emission of electrons when light packets called photons are incident on a material. It is used to explain that light consists of fundamental energy packets called photons.
Question 4
1 / -0

Which of the following particles cannot be deflected by magnetic field ?

A
Electrons

B
Neutrons

C
$$\alpha-$$ particles

D
Protons

Solution

Neutrons do not have charges
$$ \vec{F} $$ = q $$\vec{v}$$ x $$\vec{B}$$
where q = 0
Question 5
1 / -0

In which of the following fields cathode rays show minimum deflection ?

A
Electric field

B
Magnetic field

C
Plasma field

D
Gravitational field

Solution

Gravitational field applies minimum force on cathode rays because gravitational forces are proportional to masses but not charges
Question 6
1 / -0

How will you relate velocity of cathode rays to c, if ‘c' denotes the velocity of light?

A
Equal to c

B
Greater than c

C
Less than c

D
Either greater or less than c

Solution

Nothing can be faster or equal to the speed of light (according to the theory of relativity).
Question 7
1 / -0

Anti-particle of proton is

A
Electron

B
Antiproton

C
Positron

D
Neutron

Solution

antiparticle of proton is antiproton.
Question 8
1 / -0

Pick out correct statement from the following regarding photons :

A
Zero rest mass and zero spin

B
Zero rest mass and half integral spin

C
Zero rest mass and spin of unity

D
Unit rest mass and spin of unity

Solution

Rest mass of photon is zero because it is just a form of energy.
Spin of a photon is 1 .
Question 9
1 / -0

The rest mass of a photon is

A
zero

B
$$1.6\times 10^{-19}kg$$

C
$$3.1\times 10^{-30}kg$$

D
$$9.1\times 10^{-31}kg$$

Solution

Correct answer: option (A)
The explanation for the correct answer:
Photons are defined as the quantum form of electromagnetic waves and are chargeless, massless particles that travel at the speed of light.
Therefore, the rest mass of a photon is zero
Question 10
1 / -0

The particle that possesses half integral spin is

A
Photon

B
Pion

C
Proton

D
K-meson

Solution

The proton, neutron, and electron possess half-integer spin states

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Re-Attempt Weekly Quiz Competition

List - 1	List - 2
a) Burning candle	e) line spectrum
b) Sodium vapour	f) continuous spectrum
c) Bunsen flame	g) bond spectrum
g) Dark lines in solar spectrum	h) Absorption spectrum

Atoms Test - 13

Result

Atoms Test - 13

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Rank

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SHARING IS CARING

Question 1

a-g, b-e, c-f, d- h

a- g, b-f, c-e, d-h

a-f, b-g, c-e, d-h

a-f, b-e, c-g, d-h

Solution

Question 2

line spectrum

band spectrum

continuous spectrum

characteristic spectrum

Solution

Question 3

Photons

Electrons

Electromagnetic waves

Mechanical waves

Solution

Question 4

Electrons

Neutrons

$$\alpha-$$ particles

Protons

Solution

Question 5

Electric field

Magnetic field

Plasma field

Gravitational field

Solution

Question 6

Equal to c

Greater than c

Less than c

Either greater or less than c

Solution

Question 7

Electron

Antiproton

Positron

Neutron

Solution

Question 8

Zero rest mass and zero spin

Zero rest mass and half integral spin

Zero rest mass and spin of unity

Unit rest mass and spin of unity

Solution

Question 9

zero

$$1.6\times 10^{-19}kg$$

$$3.1\times 10^{-30}kg$$

$$9.1\times 10^{-31}kg$$

Solution

Question 10

Photon

Pion

Proton

K-meson

Solution

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