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WorksheetsPhysics XII - ATP Practice
Total questions: 100
Worksheet time: 50mins
Name
Class
Date
1.
Which of the following properties of matter is used in the construction of a thermometer?
a)
A. Expansion of mercury on heating
b)
B. Change of color with temperature
c)
C. Expansion of matter on heating
d)
D. All of the above
2.
Mercury is used in mercury-glass thermometer as a thermometric substance because
a)
A. It does not wet the capillary tube wall
b)
B. It is opaque
c)
C. Its expansion is uniform over a wide range of temperature
d)
D. All of the above
3.
Two fixed points used for the temperature scales are
a)
A. The temperatures of freezing and boiling mercury
b)
B. The temperatures of freezing and boiling water
c)
C. The temperature of water at 0°C and 100°C
d)
D. None of these
4.
In liquid-in-glass thermometer the thermometric property used is
a)
A. Thermal expansion
b)
B. Colour change on heating
c)
C. Both A and B
d)
D. None of these
5.
Which of the following is correct?
a)
A. 1°F = 1°C
b)
B. 1°F > 1°C
c)
C. 1°F < 1°C
d)
D. None of these
6.
Which of the following is correct? (w.r.t) size of division?
a)
A. 1°C > 1K
b)
B. 1°C = 1K
c)
C. 1°C < 1K
d)
D. None of these
7.
The Centigrade and Fahrenheit scales have the same reading at
a)
A. 40°
b)
B. 140°
c)
C. -140°
d)
D. -40°
8.
One degree of centigrade scale is equal to (w.r.t) size to division:
a)
A. 1° of Fahrenheit
b)
B. 1.8° of Fahrenheit
c)
C. 32° of Fahrenheit
d)
D. 3° of Fahrenheit
9.
The temperature of absolute zero corresponds to
a)
A. -273°C
b)
B. 273°C
c)
C. 0°C
d)
D. 20°C
10.
What temperature of Fahrenheit scale corresponds to absolute zero?
a)
A. 32°F
b)
B. 212°F
c)
C. -32°F
d)
D. -460°F
11.
Two charges when 10 cm apart attract each other with a force of F Newtons. When 5 cm apart, these charges will attract each other with a force of:
a)
A. F/4
b)
B. F/2
c)
C. 2F
d)
D. 4F
12.
The force between two charges is 28 N. If the paraffin wax of relative permittivity 2.8 is introduced between the charges as a medium, then the force reduces to:
a)
A. 25 N
b)
B. 20 N
c)
C. 15 N
d)
D. 10 N
13.
If the quantity of the charge on each of the two bodies is doubled, the force between them becomes:
a)
A. Twice
b)
B. Four times
c)
C. Nine times
d)
D. Sixteen times
14.
The unit of charge in the SI system is:
a)
A. Volt
b)
B. Ampere
c)
C. Coulomb
d)
D. Watt
15.
One coulomb is that quantity of charge which, when placed one meter from an identical charge in a vacuum (or air), repels with the force:
a)
A. 9 × 10^10 N
b)
B. \( 9 \times 10^{11} \) N
c)
C. \( 0.9 \times 10^{13} \) N
d)
D. 9 × 10^9 N
16.
The minimum charge on any body cannot be less than:
a)
A. 1 × 10^-19 C
b)
B. 1.6 × 10^-19 C
c)
C. 1.8 × 10^-19 C
d)
D. 2.5 × 10^-19 C
17.
How many electrons are there in one coulomb of charge?
a)
A. 6 × 10^21
b)
B. 1.6 × 10^18
c)
C. 6.25 × 10^18
d)
D. 9.1 × 10^19
18.
The space around any charge in which its influence could be felt by another charge placed there is called:
a)
A. Electric field
b)
B. Magnetic field
c)
C. Magnetic field
d)
D. Electric field intensity
19.
Electric field intensity \( E \) at any point surrounding the charge \( q \) is defined as:
a)
A. The charge per unit time
b)
B. The force per unit positive charge
c)
C. The force per unit area
d)
D. None of the above
20.
It is a vector quantity:
a)
A. Electric potential
b)
B. Electric charge
c)
C. Electric field intensity
d)
D. Electric current
21.
Which of the following represents an electric current?
a)
A. J/sec
b)
B. Erg/sec
c)
C. N/sec
d)
D. C/sec
22.
In an external circuit the direction of flow of conventional current is
a)
A. In the direction of flow of electrons
b)
B. From negative to positive
c)
C. From positive to negative
d)
D. From in the flow of electrons
23.
On increasing the temperature of a conductor, its resistance
a)
A. Decreases
b)
B. Increases
c)
C. Remains unchanged
d)
D. Slightly decreases
24.
The resistance of a conductor
a)
A. Increases with increase in its length
b)
B. Decrease with increase in area
c)
C. Increases with increase in temperature
d)
D. All of these
25.
When the temperature of a conductor is decreased its resistivity
a)
A. Increases
b)
B. Decreases
c)
C. Remains unchanged
d)
D. Increases very rapidly
26.
The resistivity of a conductor depends on
a)
A. Its length & area of cross section
b)
B. Nature of material
c)
C. Its temperature
d)
D. B & C
27.
In a parallel combination of resistors, the equivalent resistance is always
a)
A. Less than the least resistance in the combination
b)
B. Greater than the least resistance in the combination
c)
C. Equal to the least resistance in the combination
d)
D. None of these
28.
Three resistors of resistance 3 ohm each are connected in parallel their equivalent resistance is
a)
A. 9 ohm
b)
B. 1.5 ohm
c)
C. 3 ohm
d)
D. 1 ohm
29.
Three resistors of 1, 2 and 3 ohms are connected in series through a battery of 12 volts. The current flowing through each resistor will be
a)
A. 2 amp
b)
B. 600 ohm
c)
C. 112121 ohm
d)
D. 12 ohm
30.
Combining three resistances of 5.5Ω each. Their maximum equivalent resistance is
a)
A. 1.83 kΩ
b)
B. 16.5Ω
c)
C. 5.5 kΩ
d)
D. 166.37 kΩ
31.
A substance that attracts small pieces of iron and points towards north-south direction when suspended freely is called
a)
A. Compass
b)
B. Magnet
c)
C. North pole
d)
D. South pole
32.
A magnet with a single pole is
a)
A. Possible
b)
B. Sometimes possible
c)
C. Not possible
d)
D. None of the above
33.
The magnetic field induction is a
a)
A. Vector quantity
b)
B. Scalar quantity
c)
C. Both scalar & vector
d)
D. None of the above
34.
The magnetic lines of force around a current-carrying wire
a)
A. Are parallel to the wire
b)
B. Form concentric circles
c)
C. Form sinusoidal waves along the wire
d)
D. None of the above
35.
As the distance from the current carrying wire increases, the strength of the magnetic field due to it
a)
A. Decreases
b)
B. Increases
c)
C. Remains unchanged
d)
D. All of the above
36.
The direction of the magnetic lines of force around a current carrying wire is given by
a)
A. Right-hand rule
b)
B. Left-hand rule
c)
C. Head of tail rule
d)
D. Kickoff's rule
37.
The charge moving parallel to magnetic field B with a certain velocity experiences
a)
A. Maximum force
b)
B. Variable force
c)
C. No force
d)
D. All of the above
38.
The charge moving with certain velocity perpendicular to magnetic field B experiences
a)
A. No force
b)
B. Maximum force
c)
C. Minimum force
d)
D. None of the above
39.
The magnetic force acting on a charge is always perpendicular to
a)
A. Velocity only
b)
B. Magnetic field only
c)
C. Both velocity and magnetic field
d)
D. None of the above
40.
Flux per unit area is called
a)
A. Flux Density
b)
B. Gauss' Law
c)
C. Torque
d)
D. None of the above
41.
An electrical measuring instrument converts electrical energy into:
a)
A. Heat energy
b)
B. Chemical energy
c)
C. Light energy
d)
D. Mechanical energy
42.
When a current is passed through a rectangular coil suspended in a magnetic field, it experiences torque. This is the principle employed in the work of a:
a)
A. Potentiometer
b)
B. Galvanometer
c)
C. Slide wire bridge
d)
D. None of the above
43.
The torque produced due to the reaction of twisted suspension wire (strip) is known as:
a)
A. Restoring couple
b)
B. Deflecting torque
c)
C. Deflecting couple
d)
D. None of the above
44.
The torque per unit twist of the suspension wire of the coil gives the value of:
a)
A. Deflection
b)
B. Torque
c)
C. Constant C
d)
D. None of the above
45.
For equilibrium position of the coil, the deflecting torque (couple) is:
a)
A. Greater than restoring couple
b)
B. Less than restoring couple
c)
C. Equals to restoring couple
d)
D. None of these
46.
If the value of factor C/BAN is made small, the galvanometer can be made:
a)
A. Sensitive
b)
B. Accurate
c)
C. Undamaged
d)
D. None of these
47.
Curved magnetic poles with a fixed soft-iron cylinder in a moving coil galvanometer make the field:
a)
A. Parallel
b)
B. Radial
c)
C. Varying
d)
D. None of these
48.
A device used for the detection and measurement of current is called:
a)
A. Voltmeter
b)
B. Capacitor
c)
C. Galvanometer
d)
D. All of the above
49.
A voltmeter (or ammeter) is constructed after some modifications in a:
a)
A. Potentiometer
b)
B. Galvanometer
c)
C. Rheostat
d)
D. All of the above
50.
When a suitable low resistance is connected in parallel with the galvanometer, it is converted into:
a)
A. Voltmeter
b)
B. Avometer
c)
C. Ammeter
d)
D. All of these
51.
Which of the following are not electromagnetic waves?
a)
A. Light waves
b)
B. X-rays
c)
C. Heat waves
d)
D. Sound waves
52.
Which of the following are electromagnetic waves?
a)
A. Light waves
b)
B. Sound waves
c)
C. Water waves
d)
D. Waves along a stretched string
53.
Electromagnetic waves propagate in free space with the speed of
a)
A. Electrons
b)
B. Sound
c)
C. Light
d)
D. α-particle
54.
Electromagnetic waves consist of
a)
A. Electric and magnetic field moving parallel to each other
b)
B. Electric and magnetic field moving at right angle to each other
c)
C. Electric field moving with velocity of light
d)
D. Magnetic field moving with velocity of light
55.
Near absolute zero temperature extrinsic semi-conductors behave like
a)
A. Conductors
b)
B. Metals
c)
C. Insulators
d)
D. None of these
56.
Germanium and silicon are the materials used as
a)
A. Conductors
b)
B. Semi-conductors
c)
C. Insulators
d)
D. None of these
57.
The outer most orbit of each atom in silicon contains
a)
A. Four electrons
b)
B. Two electrons
c)
C. Eight electrons
d)
D. No electrons
58.
Which of the following is donor impurity?
a)
A. Arsenic
b)
B. Indium
c)
C. Germanium
d)
D. Carbon
59.
The charge carries in P-type substances are
a)
A. Protons
b)
B. Electrons
c)
C. Holes
d)
D. Negative ions
60.
The charge carries in N-type materials are
a)
A. Electrons
b)
B. Holes
c)
C. Protons
d)
D. Positive ions
61.
A frame of reference is used to
a)
A. Find the acceleration of an object
b)
B. Locate the position of an object in space
c)
C. Rotate an object about an axis
d)
D. None of the above
62.
Michelson and Morley proved experimentally that
a)
A. There existed ether in nature
b)
B. Ether did not exist at all
c)
C. Velocity of light was not constant
d)
D. None of the above
63.
The modern view about motion is that all motions are
a)
A. Relative
b)
B. Absolute
c)
C. Both relative and absolute
d)
D. Variable
64.
The mass of the particle moving with velocity of light is:
a)
A. Infinite
b)
B. Finite
c)
C. Zero
d)
D. None of these
65.
The special theory of relativity suggests that with the increase in velocity of an object, its length
a)
A. Decreases
b)
B. Increases
c)
C. Remains the same
d)
D. None of the above
66.
According to the special theory of relativity, which of the following quantities change with increase in velocity
a)
A. Mass
b)
B. Length
c)
C. Time
d)
D. All of the above
67.
Space and time in the special theory of relativity are
a)
A. Absolute quantities
b)
B. Relative quantities
c)
C. Selection quantities
d)
D. None of the above
68.
Einstein's theory of relativity suggests that
a)
A. The laws of physics are the same in all inertial frames of reference
b)
B. The speed of light in free space is a universal constant
c)
C. The speed of light is independent of the speed of the observer
d)
D. All of the above
69.
In which of the following are Newton's laws of motion valid
a)
A. Non-inertial frame of reference
b)
B. Inertial frame of reference
c)
C. Accelerated frame of reference
d)
D. All of the above
70.
A non-inertial frame of reference is the one
a)
A. Which moves with some acceleration
b)
B. Which is at rest
c)
C. Which moves with uniform velocity
d)
D. All of the above
71.
The spectral lines of hydrogen atom in the visible region were studied by
a)
A. Balmer series
b)
B. Brackett series
c)
C. Paschen series
d)
D. Lyman series
72.
The series of lines in the ultraviolet region of the hydrogen spectrum are called
a)
A. Lyman
b)
B. Balmer
c)
C. Paschen
d)
D. Brackett
73.
Rutherford concluded that the nucleus, which is the central part of the atom, is
a)
A. Positively charged
b)
B. Negatively charged
c)
C. Electrically neutral
d)
D. None of these
74.
Electron in hydrogen atom jumps from any higher orbit to 𝑛=1n=1 orbit (lowest energy level). The set of lines emitted is called
a)
A. Lyman series
b)
B. Balmer series
c)
C. Paschen series
d)
D. Brackett series
75.
The Balmer series is obtained when an electron in hydrogen atom jumps from higher orbit to an orbit where 𝑛n is equal to
a)
A. 1
b)
B. 2
c)
C. 3
d)
D. 4
76.
When an electron is excited from lower to a higher orbit, it will
a)
A. Emit energy
b)
B. Absorb energy
c)
C. Absorb as well as emit energy
d)
D. None of these
77.
If an electron in an atom makes transition from higher to a lower orbit, it will
a)
A. Emit energy
b)
B. Absorb energy
c)
C. Neither emits nor absorbs energy
d)
D. Absorb as well as emit energy
78.
The radius of the second orbit in hydrogen atom is
a)
A. Greater than the first orbit
b)
B. Equal to the first orbit
c)
C. Less than the first orbit
d)
D. None of these
79.
Which of the following transition in hydrogen atom emits the photon of high frequency?
a)
A. 𝑛=1n=1 to 𝑛=2n=2
b)
B. 𝑛=2 to 𝑛=1
c)
C. 𝑛=2n=2 to 𝑛=6n=6
d)
D. 𝑛=6 to 𝑛=2
80.
Paschen series is obtained when all the transitions of electron terminate on
a)
A. Third orbit
b)
B. Second orbit
c)
C. First orbit
d)
D. Fourth orbit
81.
The mass number of a nucleus is the total number of
a)
A. Neutrons in the nucleus
b)
B. Protons in the nucleus
c)
C. Nucleons in the nucleus
d)
D. None of these
82.
Protons and neutrons in the nucleus are together called
a)
A. Mesons
b)
B. Phonons
c)
C. Photons
d)
D. Nucleons
83.
Which of the following was discovered by Chadwick in 1932?
a)
A. Electron
b)
B. Neutron
c)
C. Proton
d)
D. Atom
84.
Who determined the charge on the electron?
a)
A. J.J. Thomson
b)
B. Ampere
c)
C. Chadwick
d)
D. Milikan
85.
Positrons are created in a process known as
a)
A. Pair production
b)
B. Nuclear fission
c)
C. Nuclear fusion
d)
D. Annihilation of matter
86.
The nuclear forces are
a)
A. Long range forces
b)
B. Short range forces
c)
C. Both long and short range forces
d)
D. None of these
87.
The nuclear force exists between
a)
A. Proton-neutron
b)
B. Proton-proton
c)
C. Neutron-neutron
d)
D. All of the above
88.
Isobars have
a)
A. Same atomic number but different mass number
b)
B. Same mass number but different atomic number
c)
C. Both mass number and atomic number different
d)
D. None of these
89.
The nuclei which have same number of protons but different number of neutrons are known as
a)
A. Isotopes
b)
B. Isomers
c)
C. Isobars
d)
D. None of these
90.
Atoms of an element having the same atomic number but different mass number are called
a)
A. Isobars
b)
B. Isotopes
c)
C. Isomers
d)
D. Isotones
91.
β-particles may have charge
a)
A. Only positively
b)
B. Only negatively
c)
C. Positively or Negatively
d)
D. None of these
92.
Wilson cloud chamber is an instrument used for
a)
A. Accelerating negatively charged particles
b)
B. Accelerating positively charged particles
c)
C. Making the path of ionizing particle visible
d)
D. All of the above
93.
Which of the following is not a radiation detector?
a)
A. Wilson cloud chamber
b)
B. Geiger counter
c)
C. Cyclotron
d)
D. Solid state detector
94.
The range of alpha particle in air is less because
a)
A. Only positively
b)
B. Only negatively
c)
C. Positively or Negatively
d)
D. None of these
95.
Alpha particles are highly ionized because of their
a)
A. Greater mass
b)
B. Greater charge and low speeds
c)
C. Greater density
d)
D. Greater energy
96.
Which of the following produces more ionization passing through a gas?
a)
A. Alpha particles
b)
B. Beta particles
c)
C. Gamma particles
d)
D. Electrons
97.
An alpha particle exerts large Coulomb force on nearby charges because its charge is
a)
A. Less than that of electron
b)
B. Greater than that of electron
c)
C. Twice that of electron
d)
D. None of these
98.
Which of the following materials is used for shielding γ-radiations?
a)
A. Wood
b)
B. Lead
c)
C. Air
d)
D. All of the above
99.
Which of the following is electromagnetic in nature?
a)
A. α-rays
b)
B. β-rays
c)
C. Gamma rays
d)
D. Cathode rays
100.
Capture of a neutron by a nucleus produces
a)
A. Radioisotope
b)
B. Proton
c)
C. Helium
d)
D. Deuteron
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