Electron Behavior and Energy Calculations

The video tutorial explains the concept of electric potential energy and its conversion to kinetic energy using an electron as an example. It introduces the formula for potential energy (QV) and demonstrates how to calculate the speed of an electron accelerated through a potential difference. The tutorial provides a step-by-step example calculation, illustrating the conversion of potential energy to kinetic energy and the resulting speed of the electron.

What happens to an electron when it is placed between two metal plates with a potential difference?

• It moves towards the positive plate.

• It remains stationary.

• It oscillates between the plates.

• It moves towards the negative plate.

What is the formula for electrical potential energy?

• Q/M

• 1/2 MV^2

• MV^2

• QV

What symbol is used to represent the charge of an electron?

• V

• e

• E

• Q

What happens to the potential energy of an electron as it moves towards the positive plate?

• It decreases.

• It becomes zero.

• It remains constant.

• It increases.

What is the relationship between potential energy and kinetic energy at the point just before the electron reaches the positive plate?

• Potential energy is less than kinetic energy.

• Potential energy is greater than kinetic energy.

• Potential energy is zero.

• Potential energy is equal to kinetic energy.

How is the speed of an electron calculated when it is accelerated through a potential difference?

• Using the formula V = IR

• Using the formula E = MC^2

• Using the formula v = sqrt(2eV/m)

• Using the formula F = ma

What is the potential difference used in the example calculation?

• 2000 volts

• 10000 volts

• 5000 volts

• 1000 volts

What is the charge of an electron used in the example calculation?

• 1.6 x 10^-19 C

• 9.1 x 10^-31 C

• 1.6 x 10^-18 C

• 9.1 x 10^-30 C

What is the mass of an electron used in the example calculation?

• 9.1 x 10^-31 kg

• 1.6 x 10^-19 kg

• 1.6 x 10^-18 kg

• 9.1 x 10^-30 kg

What is the calculated speed of the electron in the example?

• 4.2 x 10^5 m/s

• 4.2 x 10^8 m/s

• 4.2 x 10^7 m/s

• 4.2 x 10^6 m/s