0
Why isn't the resistance of a torch bulb a straight line on a graph?
Wiki User
∙ 11y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
How does a bulb glow when a torch is switched on?
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.
What is an example of a circuit that doesnt obey Ohms Law?
The easiest circuit that does not obey Ohm's law is a circuit that has a resistance that depends on temperature. For example, if you take a light bulb and draw a current-vs-voltage, you see that in the beginning (under low voltage) the graph is NOT a straight line, but under high voltage the graph is linear. This is because the resistance depends on temperature. the equation V=IR isn't consistent with the graph's shape.
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
A torch is operated by a 3v battery when the switch is closed the bulb draws 0.075 amps from the battery what is the resistance of the bulb?
V=IR R=V/I V=3V I=0.075A R=3/0.075 = 40 ohms
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.
What is the resistance of a torch bulb rated at 2.5 V and 500 mA?
well if the potential difference (voltage) that i apllied across the light bulb is exacty 2.5v (as it can vary due to the interal resistance of th batteris used) then you can use Resistance=Voltage/current (R=V/I) to calculatete resistance. Therefore since 500mA is equivlant to 0.5A R=2.5/0.5=5 ohms. hopeully that is helpfull
Which has the thickest filament - a high-resistance or a low-resistance bulb?
A low resistance bulb has a thicker filament.
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
How do workers change the light bulb in the torch on the statue of liberty?
Walk to the torch with a latter and change
