An electron in a tv picture tube is accelerated through a potential difference of 10 kv before it hits the screen. what is the kinetic energy of the electron in electron volts? (1 ev = 1.6 × 10 −19 j)

1.6×10⁻¹⁵ J or 10000 ev

Explanation:

E = eV Equation 1

Where E = Energy of the electron, V = Potential difference, e = charge on an electron.

Given: V = 10 kv = 10×100 v = 10000 v,

Substitute into equation 1

E = 10000 ev

If 1 ev = 1.6×10⁻¹⁹ J,

Then, 10000 ev = 1.6×10⁻¹⁹×10000 = 1.6×10⁻¹⁵ J.

Hence the kinetic energy of the electron = 1.6×10⁻¹⁵ J or 10000 ev

The kinetic energy of the electron in electron volts is 10000 eV

Explanation:

Given;

potential difference of the electron = 10 kV = 10,000 V

one electron volt = 1 ev = 1.6 × 10⁻¹⁹ J

To determine the kinetic energy of the electron in electron volts; we multiply the potential difference of the electron by 1.6 × 10⁻¹⁹ J.

Therefore, the kinetic energy of the electron in electron volts is 10000 eV

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