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## What is the speed of an electron having kinetic energy 1.02 MeV?

we have observed speed of electron is ‘5.988 * 10^8 m/s ‘ having kinetic energy 1.02MeV!! But terribly it is about two times the speed of light (3 * 10^8 m/s) . But terribly it is about two times the speed of light (3 * 10^8 m/s) .

**How do you find the speed of an electron using kinetic energy?**

The electron starts from rest (near enough) so the kinetic energy gained is given by ½mv 2 where m is its mass and v is its speed. For an electron gun with a voltage between its cathode and anode of V = 100V the electron will have a speed of about v = 6 × 10 6 m/s.

**What is the kinetic energy of the electron in units of MeV?**

The rest mass energy of an electron is 0.511 MeV, so the kinetic energy is approximately 150\% of the rest mass energy. The electron should be traveling close to the speed of light.

### How do you calculate the kinetic energy of an electron?

Therefore, we calculate the kinetic energy using the equation E(photon) = E(threshold) + KE. Then, we can use the equation for kinetic energy (KE = 1/2 mv2) and substituting in the mass of an electron (9.11 x 10-31 kg), we can calculate the velocity for the single electron.

**What is the speed of a 1000 eV Proton?**

9.0×105m/s.

**What is the speed of a proton whose kinetic energy is 3.2 Kev?**

7.8×105m/s.

## What is the speed of electric current?

It’s the electromagnetic wave rippling through the electrons that propagates at close to the speed of light. The dimensions of the wire and electrical properties like its inductance affect the exact propagation speed, but usually it will be around 90 per cent of the speed of light – about 270,000 km/s.

**What is MeV energy?**

A MeV is the Mega electron-volt, e.g. million times more than eV. One eV is defined as the energy, that an electron ( or an other single-charged(q=1.6*10^-19 Coulombs) particle) gains when it undergoes a potential difference of 1 Volt. In the International units ( SI units) 1eV corresponds to 1.6*10^-19 Joules.

**What is the kinetic energy of electron?**

The kinetic energy of an electron is 4.55 × 10^-25 J .

### What is the speed of electron in MeV?

Hence we have observed speed of electron is ‘5.988 * 10^8 m/s ‘ having kinetic energy 1.02MeV!! But terribly it is about two times the speed of light (3 * 10^8 m/s) .

**What is the speed of an electron with kinetic energy?**

But terribly it is about two times the speed of light (3 * 10^8 m/s) . This is less than speed of light and hence it this must be the speed of the electron having kinetic energy 1.02 MeV . If I am mistaken anywhere please let me know!! Since the kinetic energy is in MeV range, we must use relativistic expression. mc^2-moc^2=kinetic energy.

**Why do we use relativistic equations to calculate the speed of electrons?**

Because an Electrons Rest Mass Energy is 0.5MeV and its speed is 1.5Mev we have to use relativistic equations to solve for speed. ― UladKasach Wed, 01 Jun ’16

## What is the speed of electron 10^10 m/s?

KE = 1/2mv^2 and one can therefore use this formula for the KE of any particle. Putting the value of k (from- (1)) and m, we get. v=1.894×10^10 m/s. Thus , the speed of electron would be of order 10^10 m/s.