# What happens to the lamp when the switch is open?

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When the switch is open, the light cannot operate since the circuit is not complete. There is no closed-loop path for the current to flow through the circuit. When the switch is closed, the light bulb operates since the current flows through the circuit.

## What happens to the lamp when the switch is closed?

Closing the switch makes the lamp light up because the cell can push an electric current around the circuit. … When the switch is closed, the lamp lights up. This is because there is a continuous path of metal for the electric current to flow around. If there were any breaks in the circuit, the current could not flow.

## What happens to the light bulb when the circuit is open?

In the open circuit the current can not flow from one end of the power source to the other. Because of this there is no current flow, and therefore the light does not turn on. Why didn’t the light bulb turn on in the open circuit? Current follows the path of ‘least resistance’ Resistance is provided by the light bulb.

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## Did the bulb light up when you opened the switch?

NO, because there is an open circuit. However it WILL glow if it is in parallel with the switch, and the switch is open. In this case the bulb will go out when the switch is is closed. If the switch is open, the bulb will never glow even if its physically placed before or after a switch….

## When a switch is closed it means that?

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.

## Why does a bulb light up in a closed circuit?

When the wires in the circuit are connected to the metal casing and metal tip of the bulb, there is a closed (or complete) circuit with the bulb. Electricity will be able to flow through the filament, causing the bulb to light up.

## Is a lamp an open circuit?

Basic Circuits

When the connections are made properly, the circuit will “close” and current will flow through the circuit and light the lamp. Once one of the wires is removed from the power source or a “break” is made in the flow, the circuit is now “open” and the lamp will no longer light.

## How is opening the switch like removing a light bulb from the circuit?

How is opening the switch like removing a light bulb from the circuit? It breaks (opens) the electrical path (circuit), so current cannot flow, and the bulbs do not light up.

## Which switch if opened will cause the light bulb to stop glowing?

Answer: (a) When switch B is closed and switch A is open, no bulb will glow because the circuit is not complete in this case.

## Which bulb can continue to glow when the switch is opened?

Bulb Y will still continue to glow if both the switches are open because bulb Y is directly connected to the battery and both of its terminals are connected to the battery.

## What is the function of a open switch?

A switch in the open position disconnects the light bulb from the battery, creating an open circuit. Turning the flashlight on by sliding the black button to the left pushes the two pieces of metal together — or closes the switch — and completes the circuit so that current can flow.

## Is a light switch normally open or closed?

A light switch is generally a “normally open contact” which, on actuation, closes a circuit and thus allows the current to flow to the series-connected light bulb (see Fig.).

## What happens if the switch is open in a series circuit?

Series Circuits In a series circuit, devices are strung together one after another so that whatever current flows through one must flow through the other, each in turn. … If the switch is open, no current will flow at all. The switch could be placed anywhere in the circuit and it would have the same effect.

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