Electric Current, Magnetism and Modern Physics

What is electric current?

• It is the flow of charged particles.

• It is the resistance to the flow of current.

• It is the amount of energy consumed.

• It is the speed of electrons.

What is the unit of measurement for electric current?

• Volt

• Ohm

• Ampere

• Coulomb

What is current density?

• It is the electric current per unit area.

• It is the amount of charge in a circuit.

• It is the resistance of a conductor.

• It is the speed of electrons.

What characterizes alternating current?

• Flows in one direction.

• Its magnitude and direction vary cyclically.

• Is constant over time.

• Does not produce heat.

What does Ohm's law establish?

• The current is inversely proportional to the resistance.

• The current is directly proportional to the potential difference.

• The resistance is constant in all circuits.

• Energy is conserved in a circuit.

How can you know the value of a resistor in real life? If you have a circuit with different resistors, you can know their value by analyzing the following color code.

What is a resistor and what is its function in an electrical circuit?

When there are several resistors connected in series in a circuit, what is the total resistance?

• The sum of their individual resistances.

• The product of their individual resistances.

• The resistance of the largest resistor.

• The resistance of the smallest resistor.

In a parallel connection, how is the equivalent resistance calculated?

• Adding the individual resistances.

• Adding the inverse of the individual resistances.

• Multiplying the individual resistances.

• Taking the average of the resistances.

What happens to the current that passes through each resistor in a series connection?

• The current is different in each resistor.

• The current is the same in each resistor.

• The current is zero in all resistors.

• The current is maximum in the first resistor.