Electric Charge: Crash Course Physics #25

What causes static electricity?

• A balance of positive and negative charges

• An imbalance of positive or negative electric charge

• The movement of protons within an atom

• The creation of new electric charges

What is the net electric charge of an electrically neutral atom?

• Positive

• Negative

• Zero

• Variable

Which statement accurately describes the difference between conductors and insulators?

• Conductors hold electrons tightly, while insulators let them move freely

• Conductors allow free electrons to move throughout the solid, while insulators limit their flow

• Insulators are always made of wood, and conductors are always made of copper

• Conductors have a positive charge, and insulators have a negative charge

What does the Law of Conservation of Electric Charge state?

• Electric charges can be created and destroyed, but only in equal amounts

• A net electric charge can be created, but it must always be positive

• Charge can only move from one place to another; it cannot be created or destroyed

• Objects always return to an electrically neutral state after charging

What happens when a charged object is connected to the ground?

• It becomes more charged.

• It becomes electrically neutral.

• It remains unchanged.

• It attracts more charges from the air.

In an experiment where a negatively charged rod is brought near a neutral metal rod, and the metal rod is then grounded, what is the final charge of the metal rod after the ground connection is removed?

• Negatively charged

• Positively charged

• Neutral

• Alternating between positive and negative

What unit is used to measure electrical charge?

• Newtons

• Kilograms

• Coulombs

• Meters

How do electrostatic forces differ from gravitational forces?

• Electrostatic forces are always attractive, while gravitational forces can be attractive or repulsive.

• Electrostatic forces can be attractive or repulsive, while gravitational forces are always attractive.

• Both forces are always attractive.

• Both forces can be attractive or repulsive.