 # How Do You Know Which Bulb Is Brighter In A Circuit?

## Which has more resistance 100w or 60w bulb?

60W bulb has higher resistance than 100W bulb.

It is because power is written on the bulb assuming that voltage is same (say for example 230V).

Therefore according to formula P = V^2/R, lower the power rating higher will be the resistance.

60 W bulb resistance = 60/230^2 = 0.00113 ohm..

## Do batteries last longer in series or parallel?

When batteries are hooked up In series, the voltage is increased. For example, two – 6 Volt batteries connected in series produce 12 Volts. When batteries are hooked up in parallel, the voltage remains the same, but the power (or available current) is increased. This means that the batteries would last longer.

## Are light bulbs in series the same brightness?

High resistance bulbs are brighter in series circuits If two bulbs in series aren’t identical then one bulb will be brighter than the other. Brightness depends on both current and voltage. Remember the current through both must be the same because the current is the same everywhere in a series circuit.

## What happens to the brightness of a bulb in a series circuit when more bulbs are added?

Exploring Series Connections As more and more light bulbs are added, the brightness of each bulb gradually decreases. This observation is an indicator that the current within the circuit is decreasing. So for series circuits, as more resistors are added the overall current within the circuit decreases.

## Can I use 40w instead of 60w?

Yes, nowadays you can replace a 60 watt light bulb with a 40 or even 35 watts LED or CFL and even will get more light than before. go ahead for LED bulbs of 30 watts.

## Which is brighter daylight or cool white?

The three primary types of color temperature for light bulbs are: Soft White (2700K – 3000K), Bright White/Cool White (3500K – 4100K), and Daylight (5000K – 6500K). The higher the Degrees Kelvin, the whiter the color temperature.

## Does higher resistance mean brighter bulb?

The higher the resistance, the more jostling and the brighter the bulb. … In fact what happens is that a higher resistance bulb decreases the current everywhere in the circuit. The slower moving charges transfer energy to the bulb at a lower rate and so the bulb is dimmer.

## How many Lux is a 100 watt light bulb?

1600 lumensTo replace a 100 watt (W) incandescent bulb, look for a bulb that gives you about 1600 lumens. If you want something dimmer, go for less lumens; if you prefer brighter light, look for more lumens. Replace a 75W bulb with an energy-saving bulb that gives you about 1100 lumens.

## Which bulb will glow brighter 60w or 100w in series?

Hence 60W bulb will consume more power and glow brighter. In Short, the voltage drop across 60W bulb is more than 100W because 60W bulb has higher resistance. Hence 60W bulb will glow brighter.

## Why do bulbs in parallel have the same brightness?

When the bulbs are in parallel, each bulb sees the full voltage V so P=V2R. Since a bulb glows brighter when it gets more power the ones in parallel will glow brighter. See, the parallel combination of resistors reduces the effective resistance of the circuit. … Hence it glows brighter.

## Which circuit has brighter bulbs?

A parallel circuit avoids this problem. Two bulbs in a simple parallel circuit each enjoy the full voltage of the battery. This is why the bulbs in the parallel circuit will be brighter than those in the series circuit.

## Which is brighter bulbs in series or parallel?

When a bulb in a series circuit is unscrewed all bulbs in the circuit go out. Increasing the number of bulbs in a series circuit decreases the brightness of the bulbs. … Bulbs in parallel are brighter than bulbs in series. In a parallel circuit the voltage for each bulb is the same as the voltage in the circuit.

## Does brightness depend on resistance?

The brightness of a lightbulb is given by its power. P = I2R, and so brightness depends on current and resistance. If the bulbs are identical, they have the same resistance. … Therefore, when you are asked to rank the brightness of identical bulbs, you are really being asked to rank the amount of current through each.

## Which bulb will glow first?

Bulb B will glow first, followed by A & C (simultaneously). A bulb will glow only when a potential difference is created across its terminal. Note that it is the potential difference which matters, not which potential is higher or lower.

## What affects the brightness of a bulb?

The bulb (assuming incandescent here) brightness depends on the temperature of the filament. That in turn depends on the power being dissipated per length of the filament. … Ultimately, the brightness is determined by the input voltage. The filament of a lamp increases in resistance as it builds up in heat.

## How do you determine brightness of a bulb?

A lumen measures the amount of light that comes from a bulb, also known as light bulb brightness. A standard 40W bulb is equal to 400+ lumens, which represents the brightness of a bulb. Typically, the higher the wattage, the higher the lumens, and the more light output. You may wonder how many lumens are in a watt.

## What happens if resistance is too high?

If resistance is too high, current will be low if voltage is okay. NOTE: When the voltage stays the same, such as in an Automotive Circuit… current goes up as resistance goes down, and current goes down as resistance goes up. Bypassed devices reduce resistance, causing high current.