# Electric Instrument & Conductor in Electric Field

• DriggyBoy
In summary, the conversation discusses the influence of strong electric fields on sensitive instruments and ways to prevent this effect. It is suggested that the instrument is a conductor, and placing it inside a conductor can neutralize the outside electric field. The concept of electric field lines being perpendicular to the conducting surface is also mentioned. The idea of using shielded cables to keep out electric fields is brought up as a possible solution.

#### DriggyBoy

I was shuffling through the previous years question papers & I got this question !

'' A sensitive instrument is influenced by the strong electric field. Write a possible way to prevent this effect. Why is the electric field normal to the surface? ''

I am not sure what the answer it. But this is what i figured out.
"
It is obvious that the instrument is a conductor. Therefore it has got excess of free electrons. These free electrons will arrange them in such a way that develops an inner electric field which will cancel the electric field of the outside. There will be accumulation of negative charges on one side & positive on the other. Hence the effect of the outside electric field is neutralized.
Electric field lines are always perpendicular to the conducting surface; because it they form any other angle with respect to the surface they would cancel each other out because of symmetry.
"

So how would you prevent an electric field from affecting the instrument? Can you change the instrument? Or do you need to keep the field from getting to the instrument?

Have you studied anything that can keep out an electric field?

A hint: There is no electric field inside a conductor.

You guys mean to say,
Placing the sensitive instrument inside a conductor ?

DriggyBoy said:
You guys mean to say, Placing the sensitive instrument inside a conductor ?

Have you heard of shielded cables?

## 1. What is an electric field?

An electric field is a region in space around an electrically charged object where other electrically charged objects experience a force. It is created by the presence of an electric charge and can be visualized using electric field lines.

## 2. What is an electric conductor?

An electric conductor is a material or substance that allows electric charges to flow through it easily. This is because the valence electrons in the conductor are loosely bound and can move freely in response to an applied electric field.

## 3. How do electric instruments work?

Electric instruments use the principles of electricity and electromagnetism to produce sound. They typically have a source of electricity, such as a battery, that provides power to the instrument. The electric current is then manipulated by various components, like pickups or amplifiers, to create and amplify sound.

## 4. What is the difference between a conductor and an insulator?

A conductor is a material that allows electric charges to flow through it easily, while an insulator is a material that does not allow electric charges to flow through it. This is because the electrons in a conductor can move freely, while the electrons in an insulator are tightly bound and cannot move as easily.

## 5. How does an electric field affect a conductor?

When a conductor is placed in an electric field, the free electrons within the conductor will experience a force and will move in the direction of the field. This movement of electrons creates an electric current, which can be harnessed for various purposes, such as powering electric instruments.