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.
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/