Wattless current is the current that does not dissipate power in a circuit, even though current flows. It occurs in purely inductive or capacitive circuits where the power factor is zero, and no net energy is transferred. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/phRead more
Wattless current is the current that does not dissipate power in a circuit, even though current flows. It occurs in purely inductive or capacitive circuits where the power factor is zero, and no net energy is transferred.
Mutual inductance between two coils is the amount of magnetic flux linked with one coil when a unit current flows through the other coil. It quantifies the coupling effect between the coils due to magnetic interaction. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physiRead more
Mutual inductance between two coils is the amount of magnetic flux linked with one coil when a unit current flows through the other coil. It quantifies the coupling effect between the coils due to magnetic interaction.
When a bulb and capacitor are connected in series to an A.C. source, increasing the frequency reduces the capacitive reactance X c, which decreases the circuit's impedance. As a result, current increases, making the bulb's brightness increase with frequency. For more visit here: https://www.tiwariacRead more
When a bulb and capacitor are connected in series to an A.C. source, increasing the frequency reduces the capacitive reactance X c, which decreases the circuit’s impedance. As a result, current increases, making the bulb’s brightness increase with frequency.
Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive. For more visit here: https://www.tiwariacademy.coRead more
Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive.
(i) Power is maximum when the power factor is 1, occurring in a pure resistive circuit or at resonance in an A.C. circuit. (ii) Power is minimum when the power factor is zero, occurring in pure inductive, pure capacitive, or their combination circuits. For more visit here: https://www.tiwariacademy.Read more
(i) Power is maximum when the power factor is 1, occurring in a pure resistive circuit or at resonance in an A.C. circuit.
(ii) Power is minimum when the power factor is zero, occurring in pure inductive, pure capacitive, or their combination circuits.
The power dissipation in the circuit is zero because the voltage leads the current by 2π/2. Hence, the power factor cos ϕ = 0, and since power P = VI cosϕ, no power is dissipated. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
The power dissipation in the circuit is zero because the voltage leads the current by 2π/2. Hence, the power factor cos ϕ = 0, and since power P = VI cosϕ, no power is dissipated.
A step-up transformer increases a low alternating voltage input to a higher alternating voltage output. It achieves this by having more turns in the secondary coil than the primary, boosting voltage while reducing current proportionally, maintaining power balance. For more visit here: https://www.tiRead more
A step-up transformer increases a low alternating voltage input to a higher alternating voltage output. It achieves this by having more turns in the secondary coil than the primary, boosting voltage while reducing current proportionally, maintaining power balance.
No, a transformer cannot be used in d.c. circuits because there is no change in magnetic flux. Transformers require alternating current (A.C.) to create a changing magnetic field, which induces voltage in the secondary coil through electromagnetic induction. For more visit here: https://www.tiwariacRead more
No, a transformer cannot be used in d.c. circuits because there is no change in magnetic flux. Transformers require alternating current (A.C.) to create a changing magnetic field, which induces voltage in the secondary coil through electromagnetic induction.
What is wattless current?
Wattless current is the current that does not dissipate power in a circuit, even though current flows. It occurs in purely inductive or capacitive circuits where the power factor is zero, and no net energy is transferred. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/phRead more
Wattless current is the current that does not dissipate power in a circuit, even though current flows. It occurs in purely inductive or capacitive circuits where the power factor is zero, and no net energy is transferred.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
Difine the term ‘mutual inductance’ between the two coils.
Mutual inductance between two coils is the amount of magnetic flux linked with one coil when a unit current flows through the other coil. It quantifies the coupling effect between the coils due to magnetic interaction. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physiRead more
Mutual inductance between two coils is the amount of magnetic flux linked with one coil when a unit current flows through the other coil. It quantifies the coupling effect between the coils due to magnetic interaction.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
A bulb and a capacitor are connectedin series to an a.c. source of variable frequency. How will the brightness of the bulb change on increasing the frequency of the a.c. source. Give reason.
When a bulb and capacitor are connected in series to an A.C. source, increasing the frequency reduces the capacitive reactance X c, which decreases the circuit's impedance. As a result, current increases, making the bulb's brightness increase with frequency. For more visit here: https://www.tiwariacRead more
When a bulb and capacitor are connected in series to an A.C. source, increasing the frequency reduces the capacitive reactance X c, which decreases the circuit’s impedance. As a result, current increases, making the bulb’s brightness increase with frequency.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
Can the instantaneous power output of an a.c. source ever be negative? can the average power output be negative?
Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive. For more visit here: https://www.tiwariacademy.coRead more
Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
State the conditions under which power is (i) maximum, and (ii) minimum.
(i) Power is maximum when the power factor is 1, occurring in a pure resistive circuit or at resonance in an A.C. circuit. (ii) Power is minimum when the power factor is zero, occurring in pure inductive, pure capacitive, or their combination circuits. For more visit here: https://www.tiwariacademy.Read more
(i) Power is maximum when the power factor is 1, occurring in a pure resistive circuit or at resonance in an A.C. circuit.
(ii) Power is minimum when the power factor is zero, occurring in pure inductive, pure capacitive, or their combination circuits.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
The instantaneous current and voltage of an a.c. circuit are given by I = 10 sin 314 t A and V = 50 sin (314t + π/2) V. What is the power dissipation in the circuit?
The power dissipation in the circuit is zero because the voltage leads the current by 2π/2. Hence, the power factor cos ϕ = 0, and since power P = VI cosϕ, no power is dissipated. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
The power dissipation in the circuit is zero because the voltage leads the current by 2π/2. Hence, the power factor cos ϕ = 0, and since power P = VI cosϕ, no power is dissipated.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
What is the fuction of a step up transformer?
A step-up transformer increases a low alternating voltage input to a higher alternating voltage output. It achieves this by having more turns in the secondary coil than the primary, boosting voltage while reducing current proportionally, maintaining power balance. For more visit here: https://www.tiRead more
A step-up transformer increases a low alternating voltage input to a higher alternating voltage output. It achieves this by having more turns in the secondary coil than the primary, boosting voltage while reducing current proportionally, maintaining power balance.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/
Can a transformer be used in d.c. circuits? Why?
No, a transformer cannot be used in d.c. circuits because there is no change in magnetic flux. Transformers require alternating current (A.C.) to create a changing magnetic field, which induces voltage in the secondary coil through electromagnetic induction. For more visit here: https://www.tiwariacRead more
No, a transformer cannot be used in d.c. circuits because there is no change in magnetic flux. Transformers require alternating current (A.C.) to create a changing magnetic field, which induces voltage in the secondary coil through electromagnetic induction.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/