. In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 22000 V. The speeds of the electrons are quite large, and for accurate calculations of the speeds, the effects of special relativity must be taken into account. Ignoring such effects, find the electron speed just before the electron strikes the screen.

The speeds of the electrons is

Explanation:

Given that,

Potential difference = 22000 V

The difference in electron potential energy is converted  into kinetic energy.

We need to calculate the speed

Using conservation of energy

Where, V = potential difference

q = charge of electron

m = mass of electron

Hence, The speeds of the electrons is

the answer would be c

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.