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Atoms
- Online Test
Atoms
TEST : 1
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q1.
According to ‘plum pudding model’ atoms on the whole are electrically neutral because
A.
the positive charge of the atom is uniformly distributed throughout the volume of the electron and the negative charge of electrons balances positive parts
B.
positive charge is concentrated at one place and negative charge is elsewhere.
C.
the positive charge of the atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it
D.
the negative charge of the atom is uniformly distributed throughout the volume of the atom and the positively charged electrons are embedded in it
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Answer :
Option C
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q2.
Each element is associated with
A.
no light radiation or absorption
B.
with a characteristic radiation of monochromatic light
C.
with a characteristic absorption of monochromatic light
D.
with a characteristic spectrum of radiation
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Answer :
Option D
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q3.
In Geiger-Marsden experiment very small deflection of the beam was expected because
A.
most particles pass through
B.
positive charge and the negative electrons are distributed through the whole atom reducing electric field inside the atom
C.
particles are collimated by lead screens
D.
there are no electrical forces at work
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Answer :
Option B
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q4.
Which of these statements correctly describe the atomic model according to classical electromagnetic theory ?
A.
The waves emitted by electrons are discrete
B.
The electrons would spiral inwards and fall into the nucleus
C.
the positive charge and negative electron cancel and no waves are radiated
D.
electrons do not radiate electromagnetic waves
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Answer :
Option B
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q5.
In Geiger-Marsden experiment prediction was that
A.
All the particles would go through the foil with hardly any deflection
B.
some particles would be expected at 75
∘
C.
All the particles would bounce from the foil at 180
∘
D.
some particles would be expected at 45
∘
View Solution
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Answer :
Option A
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q6.
In Geiger-Marsden experiment, at the point of closest approach
A.
the kinetic energy is not zero and the electrical potential is greater than the initial kinetic energy supplied
B.
the kinetic energy is not zero and the electrical potential is less than the initial kinetic energy supplied
C.
the kinetic energy is not zero and the electrical potential equals the initial kinetic energy supplied
D.
the kinetic energy is zero and the electrical potential equals the initial kinetic energy supplied
View Solution
Add Work Space
Answer :
Option D
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q7.
In Geiger-Marsden experiment, actual results was
A.
Number of particles at angle
ϕ
was zero at
ϕ
=80
∘
B.
Number of particles at angle
ϕ
was zero at
ϕ
=70
∘
C.
Number of particles at angle
ϕ
was zero at
ϕ
=180
∘
D.
Number of particles at angle
ϕ
was non zero at all angles including at
180
∘
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q8.
The model that best explains the results of Geiger-Marsden experiment is
A.
Bohr model
B.
Thomson model
C.
None of the above
D.
Rutherford model
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Answer :
Option D
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q9.
spectrum is
A.
The splitting into the component colors of white light when passed through a prism or a diffraction grating
B.
The splitting into the component colors or wavelengths of light when passed through a lens.
C.
the splitting into the component colors or wavelengths of monochromatic light when passed through a prism or a diffraction grating
D.
The splitting into the component colors or wavelengths of light when passed through a prism or a diffraction grating
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
# Atoms
# CBSE 12TH PHYSICS
Prepare / Learn
Q10.
Continuous spectrum is produced by
A.
lasers
B.
Hydrogen atoms in electrical field
C.
incandescent lamp
D.
Hydrogen atoms in magnetic field
View Solution
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Answer :
Option C
Explaination / Solution:
No Explaination.
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