Magnetism

In the analogy of two people playing catch in space, what causes them to repel each other?

• Gravity

• Friction

• Momentum transfer

• Air resistance

At the quantum scale, how do electrons interact to cause repulsion?

• Through direct physical contact

• By exchanging virtual photons

• Due to gravitational attraction

• By emitting light particles

What is the general rule for how electric charges interact with each other?

• All charges attract each other.

• All charges repel each other.

• Opposite charges repel, and like charges attract.

• Opposite charges attract, and like charges repel.

What is the "mysterious force" that appears when an electric charge moves near a current-carrying wire?

• Gravitational force

• Strong nuclear force

• Magnetic force

• Electrostatic force

Are you enjoying the video lesson?

• Yes

• No

When electrons move through a wire, causing an electric current, why might the wire exert a repulsive force on a nearby object from a specific reference frame?

• The electrons in the wire become positively charged.

• The protons in the wire move to the opposite side.

• There is an imbalance of positive and negative charges from that reference frame.

• The wire becomes electrically neutral.

What phenomenon occurs when an electric charge begins to move, leading to the appearance of a magnetic force?

• The charge's mass increases significantly.

• The electric field of the charge becomes distorted.

• The charge spontaneously generates new protons.

• The charge loses its electrical properties.

How does a moving charged particle behave when it enters a magnetic field?

• It experiences no force and continues in a straight line.

• It accelerates in the direction of the magnetic field.

• It follows circular trajectories, with the force depending on its velocity perpendicular to the field.

• It immediately stops moving due to the field's resistance.

What is created when an electric current flows through a long coil of wire?

• A permanent magnet.

• An electric generator.

• An electromagnet with distinct North and South poles.

• A static electric charge.