Electrics - Week 1

What are the three main particles that make up an atom?

• Protons, Neutrons, and Ions

• Protons, Electrons, and Molecules

• Protons, Neutrons, and Electrons

• Neutrons, Electrons, and Quarks

Which of the following best describes a conductor?

• A material that holds onto its electrons very tightly.

• A material that does not allow electrons to flow between atoms.

• A material with loosely bound electrons that can flow to other atoms.

• A material typically used for insulation, like glass or rubber.

How is voltage described in the context of electricity?

• The flow of electrons past a single point in a circuit.

• A restriction to the flow of electrons in a circuit.

• A pushing force of electrons within a circuit.

• The amount of energy produced by a light bulb.

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What unit is used to measure the flow of electrons (current) in a circuit?

• Volts

• Ohms

• Joules

• Amperes

What is the primary function of a resistor in an electrical circuit?

• To generate light and heat.

• To protect components by restricting current flow.

• To increase the flow of current.

• To store electric charge.

How does resistance lead to the production of light in an incandescent light bulb?

• Electrons gain energy and emit light directly.

• Collisions between electrons and atoms generate heat, causing the material to glow at a certain temperature.

• The material's atoms are rearranged, releasing photons.

• The magnetic field created by the current excites the atoms to produce light.

Which of the following methods can increase the strength of the magnetic field generated by an inductor?

• Decreasing the number of coil turns.

• Increasing the amount of current passing through the circuit.

• Using a non-magnetic core.

• Reducing the length of the wire.

What is the primary difference between Alternating Current (AC) and Direct Current (DC)?

• AC flows in one direction, while DC flows back and forth.

• AC is typically used in batteries, while DC is used in wall sockets.

• AC moves back and forth with a changing magnetic field, while DC travels only in one direction.

• AC is produced by solar panels, while DC is produced by generators.