Electric Field Strength Concepts

This video tutorial by Mr. Andersen covers the electric field of a sphere, starting with historical measurements by Charles Coulomb. It explains how adding or removing charge affects the electric field strength and explores the relationship between distance and field strength using a pHET simulation. The video demonstrates graphing electric field data and explains the inverse square law, highlighting the role of permittivity and Coulomb's constant in calculating electric field strength.

Who conducted the first measurements of the electric field of a sphere?

• Charles Coulomb

• James Clerk Maxwell

• Isaac Newton

• Albert Einstein

What happens to the electric field when a charge is added to a sphere?

• The field remains unchanged

• The field lines increase

• The field lines decrease

• The field disappears

How does the electric field strength change as the distance from the charge decreases?

• It fluctuates

• It increases

• It remains constant

• It decreases

What is the electric field strength at a distance of 2 meters from the charge in the simulation?

• 1 volt per meter

• 2.2 volts per meter

• 0.6 volts per meter

• 9 volts per meter

What type of relationship exists between electric field strength and distance from the charge?

• Exponential

• Direct

• Linear

• Inverse square

What is the equation used to represent the electric field strength around a sphere?

• E = mc^2

• E = kQ/r^2

• E = F/q

• E = V/d

What does the term 'permittivity of free space' refer to?

• The mass of an electron

• Resistance to an electric field

• The speed of light

• The charge of a proton

What geometric concept is related to the term 4πr² in the electric field equation?

• Volume of a sphere

• Circumference of a circle

• Surface area of a sphere

• Area of a circle

What constant is used in the equation for electric field strength?

• Boltzmann's constant

• Coulomb's constant

• Gravitational constant

• Planck's constant

How does the electric field strength change as the radius increases?

• It doubles

• It remains constant

• It increases

• It decreases