Will resistance be more less or same when bulb is not glowing?

Resistance will be less when the bulb is not glowing.

Why did the bulb resistance decrease?

In a parallel circuit each bulb is in its own circuit. As bulbs are added the resistance in the circuit decreases since each circuit is another pathway for electrons to move from one end of the circuit to the other.

How many bulbs of resistance 6 ohm should be joined in parallel to draw a current of 2 ampere from a battery of three balls?

Hence 4 bulbs are connected in parallel.

How the resistance of the filament of a bulb changes when the light bulb glows?

The temperature of the filament increases when it glows. So, when the temperature of the wire (bulb filament) increases, ions in it vibrate violently. As a result, the number of collisions increases and hence the resistance increases.

Do light bulbs have high or low resistance?

The filament in an incandescent bulb does not have a constant resistance. If you take a bulb and increase the voltage across it, the current increases too. An increase in current means the bulb gets hot—hot enough to glow. As the temperature increases, however, the resistance also increases.

How many bulbs of resistance should be joined in parallel to draw current of from a battery of?

4 resistors
therefore 4 resistors (bulb) should be joined in parallel to draw a current of 2A from a battery of 4V.

How does the resistance of the light bulbs differ when the bulbs are cold and when the bulbs are hot?

when bulbs are cold their resistance is very low. this causes a large current to go through the bulb when first turned on. The large current can burn out the filament. When the bulb is hot, the resistance goes up and the current decreases.

Do you expect the increasing temperature to affect the resistance of the bulb?

The resistance of a lamp increases as the temperature of its filament increases. The current flowing through a filament lamp is not directly proportional to the voltage across it.

Why does a light bulb have a high resistance?

What is the resistance of a light bulb?

Fitting a linear function to just the low current values of the data, I get a “cold” resistance of 161.5 Ω. When the bulb is glowing, the resistance (the slope of the curve) is around 490 Ω. For materials (like this filament made of tungsten), the resistance is proportional to the temperature according to this model.

Why do light bulbs glow when voltage is increased?

The filament in an incandescent bulb does not have a constant resistance. If you take a bulb and increase the voltage across it, the current increases too. An increase in current means the bulb gets hot—hot enough to glow. As the temperature increases, however, the resistance also increases. Now for the fun part.

How does current affect the temperature of a light bulb?

An increase in current means the bulb gets hot—hot enough to glow. As the temperature increases, however, the resistance also increases. Now for the fun part. Let’s measure current and voltage to determine the temperature of a light bulb.

How does resistance of a conductor increase with the increase in temperature?

In the given graph above T 1 > T 2. The straight line A is more steeper than the line B because the resistance of conductor is more at high temperature T 1 than at low temperature T 2. Hence we can conclude that resistance of a conductor increases with the increase in temperature.