Page 1
Physics
CISCE
Academic Year: 2023-2024
(English Medium)
Date & Time: 4th March 2024, 11:00 am
Duration: 2h Marks: 80
1. Answers to this Paper must be written on the paper provided separately.
2. You will not be allowed to write during the ??rst 15 minutes.
3. This time is to be spent reading the question paper.
4. The time given at the head of this Paper is the time allowed for writing the answer
s.
5. Attempt all questions from Section A and any four questions from Section B.
6. The intended marks for questions or parts of questions are given in brackets [ ].
SECTION-A (40 Marks) (Attempt all questions from this Section.)
Q1. Choose the correct answer to the questions from the given options. (Do not copy the
questions. Write the correct answer only.)
1.1. When a bell ??xed on a cycle rings, then the energy conversion that takes place is
______.
1. Gravitational potential energy to sound energy.
2. Kinetic energy to sound energy.
3. Sound energy to electrical energy.
4. Sound energy to mechanical energy.
Solution
When a bell ??xed on a cycle rings, then the energy conversion that takes place is kinetic
energy to sound energy.
Page 2
Physics
CISCE
Academic Year: 2023-2024
(English Medium)
Date & Time: 4th March 2024, 11:00 am
Duration: 2h Marks: 80
1. Answers to this Paper must be written on the paper provided separately.
2. You will not be allowed to write during the ??rst 15 minutes.
3. This time is to be spent reading the question paper.
4. The time given at the head of this Paper is the time allowed for writing the answer
s.
5. Attempt all questions from Section A and any four questions from Section B.
6. The intended marks for questions or parts of questions are given in brackets [ ].
SECTION-A (40 Marks) (Attempt all questions from this Section.)
Q1. Choose the correct answer to the questions from the given options. (Do not copy the
questions. Write the correct answer only.)
1.1. When a bell ??xed on a cycle rings, then the energy conversion that takes place is
______.
1. Gravitational potential energy to sound energy.
2. Kinetic energy to sound energy.
3. Sound energy to electrical energy.
4. Sound energy to mechanical energy.
Solution
When a bell ??xed on a cycle rings, then the energy conversion that takes place is kinetic
energy to sound energy.
Explanation:
This is because ringing a bell typically requires moving a bell component, like a lever or
clapper. Mechanical forces initially move these components. This mechanical force is
converted into kinetic energy as the clapper moves, and this kinetic energy is then
converted into sound energy when it strikes the bell.
1.2. A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is ______.
1. 5 N
2. 10 N
3. 20 N
4. 0.2 N
Solution
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is 5 N.
Explanation:
1.3. A force 'F' moves a load from A to C as shown in the ??gure below. For the calculation
of the work done, which of these lengths would you use as the displacement?
1. 3m
2. 4m
Page 3
Physics
CISCE
Academic Year: 2023-2024
(English Medium)
Date & Time: 4th March 2024, 11:00 am
Duration: 2h Marks: 80
1. Answers to this Paper must be written on the paper provided separately.
2. You will not be allowed to write during the ??rst 15 minutes.
3. This time is to be spent reading the question paper.
4. The time given at the head of this Paper is the time allowed for writing the answer
s.
5. Attempt all questions from Section A and any four questions from Section B.
6. The intended marks for questions or parts of questions are given in brackets [ ].
SECTION-A (40 Marks) (Attempt all questions from this Section.)
Q1. Choose the correct answer to the questions from the given options. (Do not copy the
questions. Write the correct answer only.)
1.1. When a bell ??xed on a cycle rings, then the energy conversion that takes place is
______.
1. Gravitational potential energy to sound energy.
2. Kinetic energy to sound energy.
3. Sound energy to electrical energy.
4. Sound energy to mechanical energy.
Solution
When a bell ??xed on a cycle rings, then the energy conversion that takes place is kinetic
energy to sound energy.
Explanation:
This is because ringing a bell typically requires moving a bell component, like a lever or
clapper. Mechanical forces initially move these components. This mechanical force is
converted into kinetic energy as the clapper moves, and this kinetic energy is then
converted into sound energy when it strikes the bell.
1.2. A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is ______.
1. 5 N
2. 10 N
3. 20 N
4. 0.2 N
Solution
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is 5 N.
Explanation:
1.3. A force 'F' moves a load from A to C as shown in the ??gure below. For the calculation
of the work done, which of these lengths would you use as the displacement?
1. 3m
2. 4m
3. 5m
4. 7m
Solution
5m
Explanation:
As displacement in the direction of force is used.
1.4. A radioactive nucleus containing 128 nucleons emits a ß-particle. After ß- emission
the number of nucleons present in the nucleus will be ______.
1. 128
2. 129
3. 124
4. 127
Solution
A radioactive nucleus containing 128 nucleons emits a ß-particle. After ß- emission the
number of nucleons present in the nucleus will be 128.
Explanation:
A neutron undergoes ß-decay, converting it into a proton and releasing a ß-particle. As a
result, the mass number stays constant while the atomic number increases by 1.
Therefore, there will still be 128 nucleons (the mass number).
1.5. Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave
radiations.
Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of
microwave radiation.
1. Both A and Rare true.
2. A is true but R is false.
3. A is false but R is true.
Page 4
Physics
CISCE
Academic Year: 2023-2024
(English Medium)
Date & Time: 4th March 2024, 11:00 am
Duration: 2h Marks: 80
1. Answers to this Paper must be written on the paper provided separately.
2. You will not be allowed to write during the ??rst 15 minutes.
3. This time is to be spent reading the question paper.
4. The time given at the head of this Paper is the time allowed for writing the answer
s.
5. Attempt all questions from Section A and any four questions from Section B.
6. The intended marks for questions or parts of questions are given in brackets [ ].
SECTION-A (40 Marks) (Attempt all questions from this Section.)
Q1. Choose the correct answer to the questions from the given options. (Do not copy the
questions. Write the correct answer only.)
1.1. When a bell ??xed on a cycle rings, then the energy conversion that takes place is
______.
1. Gravitational potential energy to sound energy.
2. Kinetic energy to sound energy.
3. Sound energy to electrical energy.
4. Sound energy to mechanical energy.
Solution
When a bell ??xed on a cycle rings, then the energy conversion that takes place is kinetic
energy to sound energy.
Explanation:
This is because ringing a bell typically requires moving a bell component, like a lever or
clapper. Mechanical forces initially move these components. This mechanical force is
converted into kinetic energy as the clapper moves, and this kinetic energy is then
converted into sound energy when it strikes the bell.
1.2. A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is ______.
1. 5 N
2. 10 N
3. 20 N
4. 0.2 N
Solution
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is 5 N.
Explanation:
1.3. A force 'F' moves a load from A to C as shown in the ??gure below. For the calculation
of the work done, which of these lengths would you use as the displacement?
1. 3m
2. 4m
3. 5m
4. 7m
Solution
5m
Explanation:
As displacement in the direction of force is used.
1.4. A radioactive nucleus containing 128 nucleons emits a ß-particle. After ß- emission
the number of nucleons present in the nucleus will be ______.
1. 128
2. 129
3. 124
4. 127
Solution
A radioactive nucleus containing 128 nucleons emits a ß-particle. After ß- emission the
number of nucleons present in the nucleus will be 128.
Explanation:
A neutron undergoes ß-decay, converting it into a proton and releasing a ß-particle. As a
result, the mass number stays constant while the atomic number increases by 1.
Therefore, there will still be 128 nucleons (the mass number).
1.5. Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave
radiations.
Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of
microwave radiation.
1. Both A and Rare true.
2. A is true but R is false.
3. A is false but R is true.
4. Both A and Rare false.
Solution
A is true but R is false.
Explanation:
Because UV radiation has shorter wavelengths than microwave radiation, it scatters
more.
1.6. When the stem of vibrating tuning fork is pressed on a table, the tabletop starts
vibrating. These vibrations are de??nitely an example of ______.
1. Resonance
2. Natural vibrations
3. Forced vibrations
4. Damped vibrations
Solution
When the stem of vibrating tuning fork is pressed on a table, the tabletop starts
vibrating. These vibrations are de??nitely an example of Forced vibrations.
Explanation:
This occurs because the tuning fork forces the tabletop to vibrate at its own frequency.
1.7. Which of the following is a class III lever?
1. Pair of scissors
2. Wheelbarrow
3. Crowbar
4. Human forearm
Solution
Human forearm
Explanation:
Page 5
Physics
CISCE
Academic Year: 2023-2024
(English Medium)
Date & Time: 4th March 2024, 11:00 am
Duration: 2h Marks: 80
1. Answers to this Paper must be written on the paper provided separately.
2. You will not be allowed to write during the ??rst 15 minutes.
3. This time is to be spent reading the question paper.
4. The time given at the head of this Paper is the time allowed for writing the answer
s.
5. Attempt all questions from Section A and any four questions from Section B.
6. The intended marks for questions or parts of questions are given in brackets [ ].
SECTION-A (40 Marks) (Attempt all questions from this Section.)
Q1. Choose the correct answer to the questions from the given options. (Do not copy the
questions. Write the correct answer only.)
1.1. When a bell ??xed on a cycle rings, then the energy conversion that takes place is
______.
1. Gravitational potential energy to sound energy.
2. Kinetic energy to sound energy.
3. Sound energy to electrical energy.
4. Sound energy to mechanical energy.
Solution
When a bell ??xed on a cycle rings, then the energy conversion that takes place is kinetic
energy to sound energy.
Explanation:
This is because ringing a bell typically requires moving a bell component, like a lever or
clapper. Mechanical forces initially move these components. This mechanical force is
converted into kinetic energy as the clapper moves, and this kinetic energy is then
converted into sound energy when it strikes the bell.
1.2. A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is ______.
1. 5 N
2. 10 N
3. 20 N
4. 0.2 N
Solution
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of
force produced is 1 Nm, then the minimum force required is 5 N.
Explanation:
1.3. A force 'F' moves a load from A to C as shown in the ??gure below. For the calculation
of the work done, which of these lengths would you use as the displacement?
1. 3m
2. 4m
3. 5m
4. 7m
Solution
5m
Explanation:
As displacement in the direction of force is used.
1.4. A radioactive nucleus containing 128 nucleons emits a ß-particle. After ß- emission
the number of nucleons present in the nucleus will be ______.
1. 128
2. 129
3. 124
4. 127
Solution
A radioactive nucleus containing 128 nucleons emits a ß-particle. After ß- emission the
number of nucleons present in the nucleus will be 128.
Explanation:
A neutron undergoes ß-decay, converting it into a proton and releasing a ß-particle. As a
result, the mass number stays constant while the atomic number increases by 1.
Therefore, there will still be 128 nucleons (the mass number).
1.5. Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave
radiations.
Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of
microwave radiation.
1. Both A and Rare true.
2. A is true but R is false.
3. A is false but R is true.
4. Both A and Rare false.
Solution
A is true but R is false.
Explanation:
Because UV radiation has shorter wavelengths than microwave radiation, it scatters
more.
1.6. When the stem of vibrating tuning fork is pressed on a table, the tabletop starts
vibrating. These vibrations are de??nitely an example of ______.
1. Resonance
2. Natural vibrations
3. Forced vibrations
4. Damped vibrations
Solution
When the stem of vibrating tuning fork is pressed on a table, the tabletop starts
vibrating. These vibrations are de??nitely an example of Forced vibrations.
Explanation:
This occurs because the tuning fork forces the tabletop to vibrate at its own frequency.
1.7. Which of the following is a class III lever?
1. Pair of scissors
2. Wheelbarrow
3. Crowbar
4. Human forearm
Solution
Human forearm
Explanation:
Considering that the human forearm is an example of a class III lever. The load and the
fulcrum are where the e??ort is applied.
1.8. The speci??c resistance of a conductor depends on its ______.
1. Length
2. Material
3. Area of cross section
4. Radius
Solution
The speci??c resistance of a conductor depends on its material.
Explanation:
It depends on the material and is independent of the wire's dimensions, including area,
radius, length, and form.
1.9. Identify the option that displays the correct wiring with correct colour code:
1.
2.
Read More