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A thin plastic rod is bent into a circular ring of radius R. It is uniformly charged with charge density λ. The magnitude of the electric field at its center is :
A thin plastic rod is bent into a circular ring of radius R. It is uniformly charged with charge density λ. The magnitude of the electric field at its center is :
Ten capacitors, each of capacitance 1 µF, are connected in parallel to a source of 100 V. The total energy stored in the system is equal to :
Ten capacitors, each of capacitance 1 µF, are connected in parallel to a source of 100 V. The total energy stored in the system is equal to :
Consider the circuit shown in the figure. The potential difference between points A and B is :
Consider the circuit shown in the figure. The potential difference between points A and B is :
A loop carrying a current I clockwise is placed in x – y plane, in a uniform magnetic field directed along z-axis. The tendency of the loop will be to :
A loop carrying a current I clockwise is placed in x – y plane, in a uniform magnetic field directed along z-axis. The tendency of the loop will be to :
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A 10 cm long wire lies along y-axis. It carries a current of 1.0 A in the positive y-direction. A magnetic field B-> = (5 mT)j-> + (8 mT)k-> exists in the region. The force on the wire is :
A 10 cm long wire lies along y-axis. It carries a current of 1.0 A in the positive y-direction. A magnetic field B-> = (5 mT)j-> + (8 mT)k-> exists in the region. The force on the wire is :
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A galvanometer of resistance GΩ is converted into an ammeter of range 0 to I A. If the current through the galvanometer is 0.1% of I A, the resistance of the ammeter is :
A galvanometer of resistance GΩ is converted into an ammeter of range 0 to I A. If the current through the galvanometer is 0.1% of I A, the resistance of the ammeter is :
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The reactance of a capacitor of capacitance C connected to an ac source of frequency ω is ‘X’. If the capacitance of the capacitor is doubled and the frequency of the source is tripled, the reactance will become :
The reactance of a capacitor of capacitance C connected to an ac source of frequency ω is ‘X’. If the capacitance of the capacitor is doubled and the frequency of the source is tripled, the reactance will become :
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In the four regions, I, II, III and IV, the electric fields are described as : Region I : Ex = Eo sin (kz – ωt) Region II : Ex = Eo Region III: Ex = Eo sin kz Region IV : Ex = Eo cos kz The displacement current will exist in the region :
In the four regions, I, II, III and IV, the electric fields are described as : Region I : Ex = Eo sin (kz – ωt) Region II : Ex = Eo Region III: Ex = Eo sin kz Region IV : Ex = Eo cos kz The displacement current will exist in the region :
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The transition of electron that gives rise to the formation of the second spectral line of the Balmer series in the spectrum of hydrogen atom corresponds to :
The transition of electron that gives rise to the formation of the second spectral line of the Balmer series in the spectrum of hydrogen atom corresponds to :
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Ge is doped with As. Due to doping,
Ge is doped with As. Due to doping,
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Two beams, A and B whose photon energies are 3.3 eV and 11.3 eV respectively, illuminate a metallic surface (work function 2.3 eV) successively. The ratio of maximum speed of electrons emitted due to beam A to that due to beam B is :
Two beams, A and B whose photon energies are 3.3 eV and 11.3 eV respectively, illuminate a metallic surface (work function 2.3 eV) successively. The ratio of maximum speed of electrons emitted due to beam A to that due to beam B is :
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Find the temperature at which the resistance of a wire made of silver will be twice its resistance at 20°C. Take 20°C as the reference temperature and temperature coefficient of resistance of silver at 20°C = 4.0 × 10⁻³ K⁻¹.
Find the temperature at which the resistance of a wire made of silver will be twice its resistance at 20°C. Take 20°C as the reference temperature and temperature coefficient of resistance of silver at 20°C = 4.0 × 10⁻³ K⁻¹.
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Monochromatic light of frequency 5.0 × 10¹⁴ Hz passes from air into a medium of refractive index 1.5. Find the wavelength of the light (i) reflected, and (ii) refracted at the interface of the two media.
Monochromatic light of frequency 5.0 × 10¹⁴ Hz passes from air into a medium of refractive index 1.5. Find the wavelength of the light (i) reflected, and (ii) refracted at the interface of the two media.
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A plano-convex lens of focal length 16 cm is made of a material of refractive index 1.4. Calculate the radius of the curved surface of the lens.
A plano-convex lens of focal length 16 cm is made of a material of refractive index 1.4. Calculate the radius of the curved surface of the lens.
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An object is placed 30 cm in front of a concave mirror of radius of curvature 40 cm. Find the (i) position of the image formed and (ii) magnification of the image.
An object is placed 30 cm in front of a concave mirror of radius of curvature 40 cm. Find the (i) position of the image formed and (ii) magnification of the image.
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Consider a neutron (mass m) of kinetic energy E and a photon of the same energy. Let λn and λp be the de Broglie wavelength of neutron and the wavelength of photon respectively. Obtain an expression for λn / λp.
Consider a neutron (mass m) of kinetic energy E and a photon of the same energy. Let λn and λp be the de Broglie wavelength of neutron and the wavelength of photon respectively. Obtain an expression for λn / λp.
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Plot a graph showing the variation of current with voltage for the material GaAs. On the graph, mark the region where : (a) resistance is negative, and (b) Ohm's law is obeyed.
Plot a graph showing the variation of current with voltage for the material GaAs. On the graph, mark the region where : (a) resistance is negative, and (b) Ohm's law is obeyed.
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A cube of side 0.1 m is placed, as shown in the figure, in a region where electric field E-> = 500 x i-> exists. Here x is in meters and E in NC⁻¹. Calculate: (a) the flux passing through the cube, and (b) the charge within the cube.
A cube of side 0.1 m is placed, as shown in the figure, in a region where electric field E-> = 500 x i-> exists. Here x is in meters and E in NC⁻¹. Calculate: (a) the flux passing through the cube, and (b) the charge within the cube.
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Define ‘current density'. Is it a scalar or a vector ? An electric field E-> is maintained in a metallic conductor. If n be the number of electrons (mass m, charge – e) per unit volume in the conductor and its relaxation time, show that the current density j-> = aE-> , where α = (ne²/ m)τ
Define ‘current density'. Is it a scalar or a vector ? An electric field E-> is maintained in a metallic conductor. If n be the number of electrons (mass m, charge – e) per unit volume in the conductor and its relaxation time, show that the current density j-> = aE-> , where α = (ne²/ m)τ
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What is a Wheatstone bridge? Obtain the necessary conditions under which the Wheatstone bridge is balanced.
What is a Wheatstone bridge? Obtain the necessary conditions under which the Wheatstone bridge is balanced.
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A proton with kinetic energy 1.3384 × 10⁻¹⁴ J moving horizontally from north to south, enters a uniform magnetic field B of 2.0 mT directed eastward. Calculate: (a) the speed of the proton (b) the magnitude of acceleration of the proton (c) the radius of the path traced by the proton [Take (q/m) for proton = 1.0 × 10⁸ C/kg]
A proton with kinetic energy 1.3384 × 10⁻¹⁴ J moving horizontally from north to south, enters a uniform magnetic field B of 2.0 mT directed eastward. Calculate: (a) the speed of the proton (b) the magnitude of acceleration of the proton (c) the radius of the path traced by the proton [Take (q/m) for proton = 1.0 × 10⁸ C/kg]
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Study Notes
General Instructions
- This document contains general instructions for evaluation
- Evaluation procedure is crucial for accurate assessment of candidates
- Any mistakes in evaluation can negatively impact candidates
- Evaluators must understand and strictly follow the evaluation policy
- Confidential information, done and other aspects must be protected
Instructions for Evaluation
- Evaluation should adhere to the Marking Scheme
- Innovative or based on latest information answers should be evaluated for correctness
- In class X, competency-based answers should be awarded points, even if not in the Marking Scheme
- Use the correct number system 0 to 70, or the marking scheme as given in the question paper
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Description
This quiz covers important evaluation procedures crucial for accurate assessment of candidates in Class X. It highlights the significance of adhering to the marking scheme and encourages evaluators to adopt innovative methods and competency-based evaluations. Understanding and maintaining confidentiality is also addressed in the context of evaluation.
