Electric Field Strength Concepts

The video tutorial explains electric field strength, initially defined as force per coulomb, and introduces a new definition in terms of potential difference. Through examples, it illustrates how a uniform electric field affects a charge, leading to potential energy loss and work done. The concept of electric field as a potential gradient is introduced, with a mathematical representation showing the relationship between potential drop and distance. The importance of the negative sign in the potential gradient is discussed, emphasizing its role in indicating potential loss. The tutorial concludes by summarizing the electric field as a negative potential gradient.

What is the traditional definition of electric field strength?

• The resistance offered by a material

• The amount of force acting on a coulomb of charge

• The potential difference across a conductor

• The current flowing through a circuit

In a uniform electric field of 100 N/C, what force does a 1 coulomb charge experience?

• 100 N

• 150 N

• 200 N

• 50 N

What happens to the potential energy of a charge as it moves in the direction of the electric field?

• It increases

• It remains constant

• It decreases

• It doubles

How much potential energy is lost by a 1 coulomb charge moving 1 meter in a 100 N/C field?

• 150 joules

• 200 joules

• 100 joules

• 50 joules

What is the potential drop per meter in a 500 N/C electric field?

• 500 volts

• 100 volts

• 200 volts

• 300 volts

How is electric field strength defined in terms of potential difference?

• As the resistance per meter

• As the potential difference across a circuit

• As the potential drop per meter

• As the potential gain per meter

What is the unit of electric field strength when defined as potential drop per meter?

• Joules per coulomb

• Volts per meter

• Amperes per meter

• Newtons per coulomb

Why is a negative sign used in the mathematical representation of electric field as a potential gradient?

• To indicate current flow

• To indicate resistance

• To indicate potential drop

• To indicate potential gain

What does the term 'potential gradient' refer to?

• Change in temperature per meter

• Change in potential per meter

• Change in current per meter

• Change in resistance per meter

How is electric field strength described in textbooks?

• As a positive potential gradient

• As a variable potential

• As a negative potential gradient

• As a constant potential