# Why does the bulb light up when it is connected to the battery?

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## What happens to the light bulb when it is connected to the battery?

The electricity then goes through a device like a bulb, and out through a wire or some other conductor. The electricity then ends up at the other end of the battery. The energy of the electricity is used to light the bulb.

## How does a battery light up a light bulb?

When you connect the two wires to the light bulb, it will light up [source: Dave]. Electrons flow out of the negative terminal of the battery, through the bulb and back into the positive side of the battery to make the bulb light up [source: Energy Kids].

## When a battery is connected to a bulb and the bulb lights up does the energy get used up?

The electricity then goes through a device like a bulb, and out through a wire or some other conductor. The electricity then ends up at the other end of the battery. The energy of the electricity is used to light the bulb.

## What causes a light bulb to light up?

When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.

## Why are bulbs brighter in parallel?

Two light bulbs on the same series circuit share the voltage of the battery: if the battery is 9V, then each bulb gets 4.5 volts. … 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.

## Why is the filament of the bulb connected in this way?

One end is connected to the little bump at the bottom of the light bulb and the other is connected to the bulb s threaded metal base. The filament is made of thin tungsten and resists the flow of current far more than metal wire of ordinary thickness, thus leading to glowing.

## Why is it that a 60 watt light bulb will not light when connected to a 1.5 volt battery?

If the battery has too low a voltage, the current flowing through the bulb will be small and the bulb’s filament won’t get hot enough to visibly glow. If the battery has too high a voltage, so much current will flow that the filament will get too hot and vaporize.

## Why do electrons flow when both ends of the battery are connected to a wire and bulb?

Positive charges build up on the other end of the battery. … Electrons are attracted from one end of the battery to the other. Connecting these two ends allows an electric current to flow between them. Wires provide a path through which current can flow from one end of a battery to the other.

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## Why does the bulb light when you close the switch?

In a simple series circuit, why does the bulb light when you close the switch? Because closing the switch completes the circuit. … The bulb glows brighter. Imagine a circuit with a 1.5V battery and one bulb.

## What happens if you connect a battery to a small light bulb with a single wire?

If the battery is a standard AA or AAA, and you wrap the proper gauge wire around a common small bulb, then place one end of the wire against the negative side of the battery and the end of the bulb to the positive side, it will light up. If that battery is a car battery, then the bulb may burn out quickly.

## How does bulb glow?

The typical incandescent light bulb contains a thin wire (usually tungsten) called a filament that has a high electrical resistance. This filament gets very hot when an electric current passes through it. The intense temperature makes the filament glow brightly.