The use of alternating current (A.C.) voltage is preferred over direct current (D.C.) voltage for two main reasons: Easy Voltage Transformation: A.C. voltage can easily be stepped up or stepped down using transformers, making it efficient for long-distance transmission. Simpler Generation and DistriRead more
The use of alternating current (A.C.) voltage is preferred over direct current (D.C.) voltage for two main reasons:
Easy Voltage Transformation: A.C. voltage can easily be stepped up or stepped down using transformers, making it efficient for long-distance transmission.
Simpler Generation and Distribution: A.C. generators are simpler and cheaper to design and maintain compared to D.C. generators, and A.C. can be easily converted to various forms of energy for different applications.
Two characteristic properties of materials suitable for making the core of a transformer are: High Magnetic Permeability: The material should have high magnetic permeability to efficiently conduct magnetic flux and reduce energy losses. Low Hysteresis Loss: The material should exhibit low hysteresisRead more
Two characteristic properties of materials suitable for making the core of a transformer are:
High Magnetic Permeability: The material should have high magnetic permeability to efficiently conduct magnetic flux and reduce energy losses.
Low Hysteresis Loss: The material should exhibit low hysteresis loss, meaning minimal energy is wasted when the magnetic field alternates, ensuring efficient operation of the transformer.
Two factors responsible for energy losses in actual transformers are: Core Losses: Due to hysteresis and eddy currents in the core material, resulting in heat generation. Copper Losses: Caused by the resistance of the windings, which generates heat when current flows through them. For more visit herRead more
Two factors responsible for energy losses in actual transformers are:
Core Losses: Due to hysteresis and eddy currents in the core material, resulting in heat generation.
Copper Losses: Caused by the resistance of the windings, which generates heat when current flows through them.
When the lamp connected to an alternating voltage supply lights with the same brightness as when connected to a 12 V DC battery, the RMS value of the AC voltage is 12 V. The peak value (V peak ) is √2 × 12 ≈ 16.97V. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/Read more
When the lamp connected to an alternating voltage supply lights with the same brightness as when connected to a 12 V DC battery, the RMS value of the AC voltage is 12 V. The peak value (V peak ) is √2 × 12 ≈ 16.97V.
In a transformer, the power (ideally) remains unchanged. The input power in the primary winding is equal to the output power in the secondary winding, assuming no energy losses (ideal transformer condition). For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-Read more
In a transformer, the power (ideally) remains unchanged. The input power in the primary winding is equal to the output power in the secondary winding, assuming no energy losses (ideal transformer condition).
The susceptibility of −4.2 × 10-⁶ indicates that the material is diamagnetic. Diamagnetic materials have a small negative susceptibility, meaning they are weakly repelled by a magnetic field and do not retain magnetism. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physRead more
The susceptibility of −4.2 × 10-⁶ indicates that the material is diamagnetic. Diamagnetic materials have a small negative susceptibility, meaning they are weakly repelled by a magnetic field and do not retain magnetism.
The potential energy of a magnetic dipole in a uniform magnetic field is minimum (stable equilibrium) when the dipole aligns parallel to the field, with its magnetic moment (m) pointing in the same direction as the field (B). For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-1Read more
The potential energy of a magnetic dipole in a uniform magnetic field is minimum (stable equilibrium) when the dipole aligns parallel to the field, with its magnetic moment (m) pointing in the same direction as the field (B).
The reactance offered by a capacitor decreases with increasing frequency because reactance (XC) is inversely proportional to the frequency of the alternating voltage, as given by the formula XC = 1/2πfC, where f is the frequency and C is the capacitance. As the frequency increases, the rate of changRead more
The reactance offered by a capacitor decreases with increasing frequency because reactance (XC) is inversely proportional to the frequency of the alternating voltage, as given by the formula XC = 1/2πfC, where f is the frequency and C is the capacitance. As the frequency increases, the rate of change of voltage across the capacitor becomes faster, allowing it to charge and discharge more rapidly, reducing the opposition to current flow.
The underlying principle of a transformer is electromagnetic induction, based on Faraday’s law of induction. When an alternating current flows through the primary winding, it creates a changing magnetic flux in the core. This flux induces a voltage in the secondary winding, proportional to the turnsRead more
The underlying principle of a transformer is electromagnetic induction, based on Faraday’s law of induction. When an alternating current flows through the primary winding, it creates a changing magnetic flux in the core. This flux induces a voltage in the secondary winding, proportional to the turns ratio of the primary to secondary windings. The energy transfer occurs without physical contact between the windings, relying entirely on the magnetic field.
Large-scale transmission of electric energy over long distances is achieved using transformers. At power plants, step-up transformers increase the voltage, which reduces the current and minimizes transmission losses. High-voltage electricity then travels efficiently through transmission lines. At diRead more
Large-scale transmission of electric energy over long distances is achieved using transformers. At power plants, step-up transformers increase the voltage, which reduces the current and minimizes transmission losses. High-voltage electricity then travels efficiently through transmission lines. At distribution points, step-down transformers lower the voltage to safe, usable levels for consumers. This process ensures that electricity is transmitted economically and efficiently over vast distances, reducing energy loss and making it suitable for everyday use.
Why is the use of a.c. voltatage preferred over d.c. voltage? give two reasons
The use of alternating current (A.C.) voltage is preferred over direct current (D.C.) voltage for two main reasons: Easy Voltage Transformation: A.C. voltage can easily be stepped up or stepped down using transformers, making it efficient for long-distance transmission. Simpler Generation and DistriRead more
The use of alternating current (A.C.) voltage is preferred over direct current (D.C.) voltage for two main reasons:
Easy Voltage Transformation: A.C. voltage can easily be stepped up or stepped down using transformers, making it efficient for long-distance transmission.
Simpler Generation and Distribution: A.C. generators are simpler and cheaper to design and maintain compared to D.C. generators, and A.C. can be easily converted to various forms of energy for different applications.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
Mention the two characteristic properties of the material suitable for making core of a transformer.
Two characteristic properties of materials suitable for making the core of a transformer are: High Magnetic Permeability: The material should have high magnetic permeability to efficiently conduct magnetic flux and reduce energy losses. Low Hysteresis Loss: The material should exhibit low hysteresisRead more
Two characteristic properties of materials suitable for making the core of a transformer are:
High Magnetic Permeability: The material should have high magnetic permeability to efficiently conduct magnetic flux and reduce energy losses.
See lessLow Hysteresis Loss: The material should exhibit low hysteresis loss, meaning minimal energy is wasted when the magnetic field alternates, ensuring efficient operation of the transformer.
Write any two factory responsible for energy losses in actual transformers.
Two factors responsible for energy losses in actual transformers are: Core Losses: Due to hysteresis and eddy currents in the core material, resulting in heat generation. Copper Losses: Caused by the resistance of the windings, which generates heat when current flows through them. For more visit herRead more
Two factors responsible for energy losses in actual transformers are:
Core Losses: Due to hysteresis and eddy currents in the core material, resulting in heat generation.
Copper Losses: Caused by the resistance of the windings, which generates heat when current flows through them.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
When a lamp is connected to an alternating voltage supply, it lights with the same brightness as when connected to a 12 V d.c. battery. what is the peak value of alternating voltage source?
When the lamp connected to an alternating voltage supply lights with the same brightness as when connected to a 12 V DC battery, the RMS value of the AC voltage is 12 V. The peak value (V peak ) is √2 × 12 ≈ 16.97V. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/Read more
When the lamp connected to an alternating voltage supply lights with the same brightness as when connected to a 12 V DC battery, the RMS value of the AC voltage is 12 V. The peak value (V peak ) is √2 × 12 ≈ 16.97V.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
Which physical quantity remains unchanged in a transformer?
In a transformer, the power (ideally) remains unchanged. The input power in the primary winding is equal to the output power in the secondary winding, assuming no energy losses (ideal transformer condition). For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-Read more
In a transformer, the power (ideally) remains unchanged. The input power in the primary winding is equal to the output power in the secondary winding, assuming no energy losses (ideal transformer condition).
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
The susceptibility of a magnetic material is – 4.2 × 10⁻⁶. Name the type of magnetic materials it represents.
The susceptibility of −4.2 × 10-⁶ indicates that the material is diamagnetic. Diamagnetic materials have a small negative susceptibility, meaning they are weakly repelled by a magnetic field and do not retain magnetism. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physRead more
The susceptibility of −4.2 × 10-⁶ indicates that the material is diamagnetic. Diamagnetic materials have a small negative susceptibility, meaning they are weakly repelled by a magnetic field and do not retain magnetism.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-5/
What should be the orientation of a magnetic dipole in a uniform field so that its potential energy is minimum (or the dipole is in stable equilibrium)?
The potential energy of a magnetic dipole in a uniform magnetic field is minimum (stable equilibrium) when the dipole aligns parallel to the field, with its magnetic moment (m) pointing in the same direction as the field (B). For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-1Read more
The potential energy of a magnetic dipole in a uniform magnetic field is minimum (stable equilibrium) when the dipole aligns parallel to the field, with its magnetic moment (m) pointing in the same direction as the field (B).
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-5/
Explain why the reactance offered by a capacitor decreases with increasing frequency of an alternating voltage.
The reactance offered by a capacitor decreases with increasing frequency because reactance (XC) is inversely proportional to the frequency of the alternating voltage, as given by the formula XC = 1/2πfC, where f is the frequency and C is the capacitance. As the frequency increases, the rate of changRead more
The reactance offered by a capacitor decreases with increasing frequency because reactance (XC) is inversely proportional to the frequency of the alternating voltage, as given by the formula XC = 1/2πfC, where f is the frequency and C is the capacitance. As the frequency increases, the rate of change of voltage across the capacitor becomes faster, allowing it to charge and discharge more rapidly, reducing the opposition to current flow.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
State the underlying principle of a transformer.
The underlying principle of a transformer is electromagnetic induction, based on Faraday’s law of induction. When an alternating current flows through the primary winding, it creates a changing magnetic flux in the core. This flux induces a voltage in the secondary winding, proportional to the turnsRead more
The underlying principle of a transformer is electromagnetic induction, based on Faraday’s law of induction. When an alternating current flows through the primary winding, it creates a changing magnetic flux in the core. This flux induces a voltage in the secondary winding, proportional to the turns ratio of the primary to secondary windings. The energy transfer occurs without physical contact between the windings, relying entirely on the magnetic field.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
How is the large scale transmission of electric energy overlong distances donewith the use of transformers?
Large-scale transmission of electric energy over long distances is achieved using transformers. At power plants, step-up transformers increase the voltage, which reduces the current and minimizes transmission losses. High-voltage electricity then travels efficiently through transmission lines. At diRead more
Large-scale transmission of electric energy over long distances is achieved using transformers. At power plants, step-up transformers increase the voltage, which reduces the current and minimizes transmission losses. High-voltage electricity then travels efficiently through transmission lines. At distribution points, step-down transformers lower the voltage to safe, usable levels for consumers. This process ensures that electricity is transmitted economically and efficiently over vast distances, reducing energy loss and making it suitable for everyday use.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/