Вопросы по электрическому току

What is electric current?

• Movement of neutrons in a conductor

• Movement of electrons in a conductor

• Amount of energy in a circuit

• Change in conductor temperature

What is the unit of electric current?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Coulomb (C)

What is the formula for electric current?

• I = U / R

• I = Q / t

• I = P * t

• I = F / q

Which type of current periodically changes direction?

• Direct Current (DC)

• Alternating Current (AC)

• Superconducting Current

• Pulsating Current

What does Coulomb’s Law describe?

• The force of attraction between molecules

• The relationship between voltage and current

• The force between electric charges

• The efficiency of an electric current

What is the formula for Coulomb’s Law?

• F = m * a

• F = k * (|q1 * q2|) / r²

• F = q * E

• F = R * I

What is the unit of electric charge?

• Volt (V)

• Ohm (Ω)

• Ampere (A)

• Coulomb (C)

What does “r” represent in Coulomb’s Law formula?

• Radius of the Earth

• Circuit resistance

• Distance between charges

• Electric field intensity

How does the force between charges change if the distance between them is doubled?

• Increases 2 times

• Decreases 2 times

• Decreases 4 times

• Remains the same

What is the physical meaning of electric current?

• It shows the speed of moving charged particles

• It determines the power of an electrical device

• It measures electrical energy

• It represents the force of attraction between charges