A resistor slows the flow of electricity, and converts the electrical energy into heat. You don't WANT heat - you want LIGHT, so we generally do not put resistors in lighting circuits. If there is a resistor in the circuit, it will cause some of the energy that would normally be converted to light to be converted into heat instead, so the light bulb will glow less brightly. A variable resistor in such a circuit is sometimes called a "dimmer".
using a variable resistor we can adjust the sensitivity of a light dependent resistor
yes, a variable resistor
A LDR or light dependant resistor is a resistor that works when light is not shining on it, so if there is light on it it will not resist a current, you can also get them to work the other way.
air charge resistor relay
they absorb light from before and then when it is dark they glow the absorbed light
it will not glow
No, glow in the dark requires the absorption of light to emit a glow in darkness. Black lights emit ultraviolet (UV) light, which typically does not charge glow in the dark items like visible light does.
No, a tomato cannot glow when connected to a light bulb. Tomatoes do not have the ability to produce light on their own, so they cannot glow like a light bulb.
Most light bulbs don't have resistors; they are resistors. The filament introduces resistance as part of its action. The resistance is what makes it glow. Usually, if you use a resistor with a light bulb or other lighting device (neon tube, LED, etc), it is external. Its purpose is to reduce the voltage to match the requirements of the bulb. For instance, with a 50 ohm resistor, you could probably use a flashlight bulb with a 9 volt battery.
the wire in your light bulb is a resistor :)
It is a conductor, but the filament is a resistor : as current flows through the filament, some of the energy is released as heat and light.