Electric Potential and Energy Concepts

This video tutorial covers electric potential and electric potential energy, explaining their definitions and differences. It delves into the concept of voltage as electric potential difference and provides formulas for calculating work and energy. The tutorial includes example problems to illustrate these concepts and discusses the effects of forces and motion in electric fields. It concludes with calculations of work and speed for charged particles.

What is electric potential defined as?

• Resistance divided by current

• Current divided by resistance

• Charge divided by potential energy

• Potential energy divided by charge

How is voltage related to electric potential?

• Voltage is the sum of electric potentials

• Voltage is the average of electric potentials

• Voltage is the product of electric potentials

• Voltage is the difference in electric potentials

What is the voltage across a resistor if the potential at point B is 80 volts and at point A is 20 volts?

• 20 volts

• 100 volts

• 40 volts

• 60 volts

What happens to potential energy when kinetic energy increases in a system with only conservative forces?

• Potential energy doubles

• Potential energy remains constant

• Potential energy decreases

• Potential energy increases

How much work is required to move a negative 500 micro coulomb charge across a potential difference of 300 volts?

• 0.15 joules

• 0.45 joules

• 0.60 joules

• 0.30 joules

If a positive charge moves from a high potential to a low potential, what happens to its potential energy?

• Potential energy increases

• Potential energy becomes zero

• Potential energy decreases

• Potential energy remains constant

What is the final speed of a charge with a mass of 0.01 grams if it accelerates from rest through a potential difference of 300 volts?

• 100.00 m/s

• 75.00 m/s

• 54.77 m/s

• 30.00 m/s

In which direction does a positive charge move in an electric field?

• In a circular path

• Perpendicular to the electric field

• From high potential to low potential

• From low potential to high potential

What is the work done on a charge if the change in kinetic energy is positive?

• Work is undefined

• Work is zero

• Work is negative

• Work is positive

How does a negative charge behave in an electric field?

• It moves from high potential to low potential

• It remains stationary

• It moves in a circular path

• It moves from low potential to high potential