The correct answer is: D. Incandescent lamp
An incandescent lamp is a type of electric light bulb that uses a filament of tungsten wire to produce light. The filament is heated to a high temperature by an electric current, causing it to emit light. Incandescent lamps have a low power factor because they are not very efficient at converting electrical energy into light energy.
Arc lamps, induction motors, and fluorescent tubes are all types of electrical devices that can have a low power factor. Arc lamps are used in streetlights and other applications where a bright light is required. Induction motors are used in many types of machinery, including refrigerators and air conditioners. Fluorescent tubes are used in many types of lighting fixtures.
All of these devices can have a low power factor because they draw reactive power from the electrical system. Reactive power is power that is used to create a magnetic field, but does not contribute to the actual amount of light or work that is done. When a device has a low power factor, it causes the electrical system to have to supply more current than it would if the device had a high power factor. This can cause problems with the electrical system, such as voltage drop and overheating.
There are a number of ways to improve the power factor of an electrical system. One way is to use capacitors to provide reactive power to the system. Capacitors store energy in an electric field, and when they are discharged, they provide the reactive power that is needed by the devices with a low power factor. Another way to improve the power factor of an electrical system is to use power factor correction devices. These devices are installed between the electrical system and the devices with a low power factor, and they help to improve the power factor by absorbing or generating reactive power.
It is important to have a high power factor in an electrical system because it can save money and improve the efficiency of the system. When the power factor is low, the electrical system has to supply more current than it would if the power factor were high. This can cause problems with the electrical system, such as voltage drop and overheating. By improving the power factor, you can save money on your electricity bills and improve the efficiency of your electrical system.