# Which Switches Must Be Closed For The Bulb To Light Up?

## 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..

## What happens when you close a switch?

When the switch is closed, a closed loop path is created in the circuit. If there is any source or charged capacitors present in it then a current starts flowing as soon as the switch is closed. It basically means when u switch on a light on you are actually switching off the internal circuit so as to let the bulb on.

## How do you know if the switch is on or off?

The power switch is a rocker switch and it has two symbols on the face: “O” and “—“. They are the International symbols for power “On” and power “Off”. “O” means the power is OFF and “–“means the power is ON. To turn the power washer ON, press the “—“down on the power switch.

## What is the difference between an open switch and a closed switch?

The terms “open” and “closed” refer to switches as well as entire circuits. An open switch is one without continuity: current cannot flow through it. A closed switch is one that provides a direct (low resistance) path for current to flow through.

## How does electricity light a bulb?

How does it work? Edit. Electricity flows through a thin tungsten wire in the light bulb called the filament. … As a result of this resistance, the filament heats up and starts glowing, converting electrical energy to light energy.

## What happens to the brightness of light bulb 1 when the switch S is closed?

What happens to the brightness of lightbulb 1 when the switch S is closed? The brightness will increase momentarily then return to its previous level. The brightness remains the same as before the switch is closed.

## Which circuit produces more light?

In a parallel circuit, 100W bulb glows brighter due to high power dissipation instead of an 80W bulb. The bulb which dissipates more power will glow brighter. In series, both bulbs have the same current flowing through them.

## What does it mean when a circuit is broken by a switch?

noun. 14. 0. The definition of an open circuit is a broken path for an electrical current due to an open switch or frayed wire. An example of an open circuit is a string of electric lights that don’t work if one bulb goes out.

## Will the bulb light up?

Both the metal casing and tip of the bulb are connected to the circuit, forming a closed circuit. Thus, electricity is able to flow through the wires in the circuit to the filament, allowing the bulb to light up. … Thus, electricity is unable to flow through the filament, preventing the bulb from lighting up.

## Can a light bulb cause a short circuit?

The modern electronics can go faulty and cause a short circuit. This can cause an overload. … Normally when a bulb blows out it opens the circuit instead of shorting it out so there’s no strain on the breaker. Now on light fixtures it’s entirely possible for the fixture to short out and trip the breaker.

## What is a closed circuit?

a circuit without interruption, providing a continuous path through which a current can flow.

## Will all the bulbs be 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.

## Which circuit is better series or parallel?

A series circuit is a Voltage Divider. … 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.

## Why does the switch have to be closed in order for the light bulb to light?

In this case the light bulb will not turn on because all the current will flow though the path with just a wire and none through the path with the light bulb. A switch has two states Open or closed When a switch is open no current can flow through it. When a switch is closed current flows through it.

## What is the switch when the brightness of a bulb is closed?

When the switch is closed, the light bulb operates since the current flows through the circuit. The bulb glows at its full brightness since it receives its full 120 volts and has the design current flow (Figure 1).

## What will happen to a light bulb in a closed series circuit?

The same current flows through each part of a series circuit. … In the same way, if one of the bulb was unscrewed, the current flow to both the bulbs would be interrupted. If the circuit were a string of light bulbs, and one burned out, the remaining bulbs would also turn off.

## Are bulbs brighter 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.

## What happens to a bulb if there is less resistance wire?

Therefore, the bulb with the lower resistance will shine brighter. This happens because bulbs in parallel both have the same voltage across them, and therefore, more current will flow through the bulb with less resistance.

## What are the conditions for the 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.

## Is current the same in series?

The current in a series circuit goes through every component in the circuit. Therefore, all of the components in a series connection carry the same current. A series circuit has only one path in which its current can flow.