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## What is the constant for electric field?

the magnitude of the electric field (E) produced by a point charge with a charge of magnitude Q, at a point a distance r away from the point charge, is given by the equation E = kQ/r^{2}, where k is a constant with a value of **8.99 x 10 ^{9} N m^{2}/C^{2}**.

## Why electric field is constant in conductor?

As inside the conductor the electric field is zero, so no work is done against the electric field to bring a charge particle from one point to another. … Because **there is no potential difference between any two points inside the conductor**, the electrostatic potential is constant throughout the volume of the conductor.

## Is electric field always the same?

At a point in space, the direction of the electric field is tangent to the electric field line that passes through that point. The magnitude of the electric field is strongest in regions where the field lines are closest together. … **In both drawings I and II the electric field is the same everywhere.**

## How do you find the electric field of a wire?

In vector calculus notation, the electric field is given **by the negative of the gradient of the electric potential, E = −grad V**. This expression specifies how the electric field is calculated at a given point. Since the field is a vector, it has both a direction and magnitude.

## What is the value of k constant?

The constant of proportionality k is called Coulomb’s constant. In SI units, the constant k has the value. **k = 8.99 × 10 9 N ⋅ m 2 /C 2**.

## Is K the spring constant?

The letter k **represents the “spring constant**,” a number which essentially tells us how “stiff” a spring is. If you have a large value of k, that means more force is required to stretch it a certain length than you would need to stretch a less stiff spring the same length.

## Is there an electric field inside a current carrying conductor?

A more direct answer to your question: Yes, **there are both electric fields and magnetic fields around the conductor while there’s current flowing through it**. This is guaranteed by Maxwell’s equations, and the fact that current is proportional to the electric field in a conductor.