Electric Fields and Test Charges

The video tutorial explains the concept of a positive charge represented by a red sphere and its surrounding electric field lines depicted in blue. It introduces a test charge, shown as a black point, and discusses the electric field vector acting on it due to the positive charge. The tutorial further demonstrates the movement of the test charge around the positive charge, highlighting how the electric field changes as the test charge is moved closer or further away.

What color represents the positive charge in the video?

• Blue

• Red

• Yellow

• Green

What do the blue lines around the red sphere represent?

• Electric field lines

• Sound waves

• Gravitational field lines

• Magnetic field lines

How is the test charge depicted in the video?

• As a blue line

• As a black dot

• As a red sphere

• As a green arrow

What is the effect of the positive charge on the test charge?

• It creates a magnetic field

• It produces an electric field vector

• It generates a gravitational pull

• It emits light

What happens to the test charge as it moves around the positive charge?

• It disappears

• It changes distance

• It remains stationary

• It changes color