0
If your torch has an incandescent bulb in it, the resistance of the wire in the bulb generates enough heat that light is created.
If your torch has an LED bulb, the PN junction in the diode creates light when the diode is forward-biased.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What happens when the torch is switched on?
current flows and we have light from bulb....
What happens when a bulb is switched on?
when a light bulb is switched on it will blown..............
Will the bulb light if the filament is broken Why?
No, the broken filament breaks the connection which electricity needs to complete the circuit.
Which is more powerful a torch bulb or a mains filament lamp?
Mains filament
What thing besides a torch can you make with one small bulb and three batteries?
you can make a torch bulb
What is the job of the cells and wires and bulb and switch in a torch?
The job of a bulb is to give off heat and light energy
How do you make a bulb which glow on your clapping bulb?
you have to need IC 3 ,bulb
What materials are conductors in a torch?
The conducting path of a torch is a simple circuit: Battery to switch, switch to bulb, bulb back to battery. Provided the switch is on, and there are no breaks in the circuit wiring (and the bulb is good), the torch should work.
Why in an electrical lab a bulb connected to supply goes off slowly when the main supply is switched off?
the electrons in the wire connected to the bulb take a while to fade away completely as the main energy source is turned off, causing the bulb to glow faintly until all of the electricity is out of the system
Why is there glass on the end of a torch?
It is there to protect the bulb.
Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
What uses more electricity a lit light bulb or an empty socket of the same rating switched on?
When the bulb is lit it uses energy. When there is no bulb, no energy is used even if it is switched on.
