Podcast
Questions and Answers
The radioactive decay process where a helium nucleus is emitted is known as what?
The radioactive decay process where a helium nucleus is emitted is known as what?
- Gamma decay
- Positive β decay
- Negative β decay
- Alpha decay (correct)
In an extrinsic semiconductor, if E represents the energy state corresponding to an impurity, and EV and EC are the valence and conduction bands respectively, which impurity could be present if E is closer to EC?
In an extrinsic semiconductor, if E represents the energy state corresponding to an impurity, and EV and EC are the valence and conduction bands respectively, which impurity could be present if E is closer to EC?
- Phosphorous
- Antimony
- Arsenic
- Indium (correct)
A practical method to enhance the current sensitivity of a galvanometer involves __________ the number of turns of the coil.
A practical method to enhance the current sensitivity of a galvanometer involves __________ the number of turns of the coil.
increase
A __________ is a device designed to transform mechanical energy into electrical energy.
A __________ is a device designed to transform mechanical energy into electrical energy.
When two waves from coherent sources superpose in phase at a point, the intensity of light at that point is __________.
When two waves from coherent sources superpose in phase at a point, the intensity of light at that point is __________.
The energy source within stars originates from the process of __________.
The energy source within stars originates from the process of __________.
Increasing the forward bias voltage applied to a p-n junction diode will cause the width of the depletion region to __________ .
Increasing the forward bias voltage applied to a p-n junction diode will cause the width of the depletion region to __________ .
Calculate the electric potential at point P if bringing a 3 mC charge from infinity to point P requires 0.06 J of work.
Calculate the electric potential at point P if bringing a 3 mC charge from infinity to point P requires 0.06 J of work.
Which of the following factors does not affect the potential energy of an electric dipole placed in a uniform electric field?
Which of the following factors does not affect the potential energy of an electric dipole placed in a uniform electric field?
Ohm's law is universally applicable to all materials and under all conditions.
Ohm's law is universally applicable to all materials and under all conditions.
A charged particle moves perpendicularly to a uniform magnetic field. How does the particle's speed change as it moves in a circular path?
A charged particle moves perpendicularly to a uniform magnetic field. How does the particle's speed change as it moves in a circular path?
Unlike diamagnetic materials, paramagnetic materials are weakly ______ by a magnetic field.
Unlike diamagnetic materials, paramagnetic materials are weakly ______ by a magnetic field.
In the coil and magnet experiment demonstrating electromagnetic induction, what observation indicates the presence of an induced current?
In the coil and magnet experiment demonstrating electromagnetic induction, what observation indicates the presence of an induced current?
According to Cartesian sign conventions for spherical mirrors, the height of an object is always taken as negative.
According to Cartesian sign conventions for spherical mirrors, the height of an object is always taken as negative.
According to de Broglie's explanation of Bohr's second postulate, what condition must be satisfied for an electron to revolve in a stable orbit?
According to de Broglie's explanation of Bohr's second postulate, what condition must be satisfied for an electron to revolve in a stable orbit?
How does increasing the area of the plates of a parallel plate capacitor affect its capacitance, assuming all other factors remain constant?
How does increasing the area of the plates of a parallel plate capacitor affect its capacitance, assuming all other factors remain constant?
What is the magnitude of the EMF induced between the ends of a conductor moving in a magnetic field, where B is the magnetic field strength, l is the length of the conductor, and v is the velocity?
What is the magnitude of the EMF induced between the ends of a conductor moving in a magnetic field, where B is the magnetic field strength, l is the length of the conductor, and v is the velocity?
What is the SI unit of magnetic flux?
What is the SI unit of magnetic flux?
Under which condition is the average power dissipated in an AC circuit at its maximum?
Under which condition is the average power dissipated in an AC circuit at its maximum?
Which of the following electromagnetic waves has the lowest frequency?
Which of the following electromagnetic waves has the lowest frequency?
A ray of light, originating from an object and traveling parallel to the principal axis of a convex lens in air, will do which of the following after refraction through the lens?
A ray of light, originating from an object and traveling parallel to the principal axis of a convex lens in air, will do which of the following after refraction through the lens?
A glass rod is rubbed with silk cloth. What charge is acquired by the glass rod?
A glass rod is rubbed with silk cloth. What charge is acquired by the glass rod?
If unpolarized light with an intensity of 'I0' passes through a polaroid, what is the intensity of the emergent light?
If unpolarized light with an intensity of 'I0' passes through a polaroid, what is the intensity of the emergent light?
Photoelectric current is independent of the intensity of incident radiation.
Photoelectric current is independent of the intensity of incident radiation.
A spherical conductor of radius R has a charge of +Q. What is the ratio of the electric potential at the surface of the conductor to the electric potential at a distance of $\frac{R}{2}$ from the center of the conductor?
A spherical conductor of radius R has a charge of +Q. What is the ratio of the electric potential at the surface of the conductor to the electric potential at a distance of $\frac{R}{2}$ from the center of the conductor?
What is the minimum energy required to free an electron from the ground state of a hydrogen atom?
What is the minimum energy required to free an electron from the ground state of a hydrogen atom?
How does the resistivity of a metallic conductor change with a decrease in temperature?
How does the resistivity of a metallic conductor change with a decrease in temperature?
Lorentz force is the force experienced by charged particles moving in a region containing which fields?
Lorentz force is the force experienced by charged particles moving in a region containing which fields?
Consider the following statements about magnetic field lines:
Statement-I: The magnetic field lines do not intersect.
Statement-II: The direction of the magnetic field at a point is unique.
Which option is correct?
Consider the following statements about magnetic field lines: Statement-I: The magnetic field lines do not intersect. Statement-II: The direction of the magnetic field at a point is unique. Which option is correct?
A straight conductor of length ‘l’ moving with velocity ‘v’ parallel to a uniform magnetic field ‘B’ experiences a maximum induced EMF.
A straight conductor of length ‘l’ moving with velocity ‘v’ parallel to a uniform magnetic field ‘B’ experiences a maximum induced EMF.
Two identical cells, each with an EMF of 2V and an internal resistance of 1 ohm, are connected in parallel. What is the effective EMF of the combination?
Two identical cells, each with an EMF of 2V and an internal resistance of 1 ohm, are connected in parallel. What is the effective EMF of the combination?
The angle of dip at the magnetic equator is __________.
The angle of dip at the magnetic equator is __________.
Flashcards
Charge on rubbed glass rod
Charge on rubbed glass rod
The charge acquired by a glass rod when rubbed with silk cloth is positive.
Potential ratio (surface vs R/2)
Potential ratio (surface vs R/2)
The ratio of electric potential on the surface of a spherical conductor to the electric potential at a distance R/2 from the center is 1:1, as potential inside a charged sphere is constant.
Resistivity vs Temperature
Resistivity vs Temperature
The resistivity of a metallic conductor decreases with a decrease in temperature.
Lorentz Force
Lorentz Force
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Magnetic field lines properties
Magnetic field lines properties
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Resistivity
Resistivity
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Conventional current
Conventional current
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EMF full form
EMF full form
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Induced EMF Formula
Induced EMF Formula
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SI unit of magnetic flux
SI unit of magnetic flux
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Maximum Power Dissipation in AC Circuit
Maximum Power Dissipation in AC Circuit
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Lowest frequency EM waves
Lowest frequency EM waves
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Light ray through convex lens
Light ray through convex lens
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Intensity of light after Polaroid
Intensity of light after Polaroid
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Photoemission Statements
Photoemission Statements
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Minimum energy to free electron
Minimum energy to free electron
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Alpha Decay
Alpha Decay
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Acceptor Impurity
Acceptor Impurity
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Galvanometer Sensitivity
Galvanometer Sensitivity
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Generator Function
Generator Function
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Constructive Interference
Constructive Interference
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Stellar Energy Source
Stellar Energy Source
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Forward Bias Effect
Forward Bias Effect
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Properties of Electric Charges
Properties of Electric Charges
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Electric Dipole Potential Energy
Electric Dipole Potential Energy
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Limitations of Ohm’s Law
Limitations of Ohm’s Law
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Radius of Charged Particle in Magnetic Field
Radius of Charged Particle in Magnetic Field
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Paramagnetic vs. Diamagnetic
Paramagnetic vs. Diamagnetic
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Electromagnetic Induction
Electromagnetic Induction
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Cartesian Sign Conventions
Cartesian Sign Conventions
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de Broglie & Bohr's Postulate
de Broglie & Bohr's Postulate
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Work Function
Work Function
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Study Notes
- Model Question Paper 2023-24 for II PUC Physics contains
- Part A questions, with first written answer considered for marks
- Answers lacking diagrams/figures/circuits where necessary will not be awarded
- Direct answers to numerical problems won't be awarded marks without detailed solutions
Part A - Multiple Choice Questions
-
Rubbing a glass rod with silk cloth results in the glass rod acquiring a positive charge
-
For a spherical conductor of radius R carrying a charge +Q, the ratio of electric potentials at the surface to a point at distance R/2 from the center is 1:1
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The resistivity of a metallic conductor decreases with a decrease in temperature
-
Lorentz force acts on a charged particle moving in a region containing both electric and magnetic fields
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Statement-I: Magnetic field lines do not intersect, Statement-II: Direction of magnetic field at a point is unique, both statements are correct, but II is not the correct explanation for I
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For a straight conductor of length 'l' moving with velocity 'v' in the direction of uniform magnetic field 'B', the magnitude of emf induced is 0
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The SI unit of magnetic flux is weber
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Average power dissipated in an AC circuit is maximum if the AC source is connected only to a pure resistor
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Electromagnetic waves with the lowest frequency are radio waves
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A ray of light from an object incident parallel to the principal axis of a convex lens in air, after refraction, emerges without any deviation
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If unpolarized light of intensity Io passes through a polaroid, the intensity of emergent light is Io/2
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Statements about photoemission:
- Photoelectric current is independent of intensity
- Stopping potential varies for different photosensitive metal surfaces at a particular frequency
- Saturation current differs for radiations of different intensities
- Only statements (iii) and (iv) are correct
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Minimum energy to free an electron from the ground state of hydrogen is 13.6 eV
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Radioactive decay emitting a helium nucleus is called alpha decay
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In an extrinsic semiconductor diagram, the impurity present when E is the energy state is Indium
Part A - Fill in the Blanks
- Current sensitivity of a galvanometer increases with the number of turns of the coil
- A device that converts mechanical energy into electrical energy is a generator
- If two waves from coherent sources superpose in phase, the light intensity at that point is maximum
- The energy source in stars is thermonuclear fusion
- The depletion region width in a PN-junction diode decreases with increasing forward bias voltage
Part B - Answer Any Five
- Questions cover basic properties of electric charges
- Electric potential calculations
- Magnetic force between parallel conductors
- Gauss's law in magnetism, factors affecting self-inductance of a solenoid
- Transformer construction, displacement current, conditions for total internal reflection
- Differentiating conductors/insulators based on band theory
Part C - Answer Any Five
- Includes stating/explaining Coulomb's law
- Deriving potential energy of an electric dipole in a uniform field
- Limitations of Ohm's law
- Radius of circular path for a charged particle in a magnetic field
- Differences between paramagnetic and diamagnetic materials
Part D - Answer Any Three
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Covers experiments on electromagnetic induction
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Cartesian sign conventions in ray optics
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de Broglie's explanation of Bohr's postulate
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Mass defect and binding energy calculations
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Involves deriving capacitance of parallel plate capacitors
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Condition for Wheatstone bridge balance
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Magnetic field on the axis of a circular loop, Huygens principle and Snell's law, work function, photoelectric effect explanations
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Rectification and full wave rectifier explanation
Part VI - Answer Any Two
- It covers electric field calculations
- Drift velocity calculations in a copper wire
- Impedance and current calculations in a series RC circuit
- Refractive index calculations related to prisms
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Description
Model question paper for II PUC Physics 2023-24. Includes multiple choice questions and rules for answering. Focuses on electrostatics, magnetism, and conductors.
