Understanding Electricity Concepts

In a parallel circuit, how does the total current relate to the individual branch currents?

• The total current is equal to the largest branch current.

• The total current is less than the smallest branch current.

• The total current is independent of the branch currents.

• The total current is equal to the sum of the individual branch currents.

What is the unit of electric current?

• Watt

• Volt

• Ampere

• Ohm

If one light bulb in a series circuit burns out, what happens to the other bulbs?

• Only the burned-out bulb goes out.

• The circuit continues to function normally.

• The other bulbs stay lit but flicker.

• All other bulbs go out.

How do you calculate the total resistance in a parallel circuit?

• R_total = (R1 + R2 + R3 + ... + Rn) / n

• R_total = R1 + R2 + R3 + ... + Rn

• R_total = R1 * R2 * R3 * ... * Rn

• R_total = 1 / (1/R1 + 1/R2 + 1/R3 + ... + 1/Rn)

What is the effect of adding more resistors in series on the total resistance?

• The total resistance remains the same.

• The total resistance fluctuates randomly.

• The total resistance increases.

• The total resistance decreases.

In a parallel circuit, if one branch is disconnected, what happens to the other branches?

• The voltage in the other branches decreases.

• The other branches stop functioning completely.

• The current in the other branches doubles.

• The other branches continue to function normally.

What is the formula for calculating electric current?

• I = V*R

• I = R/V

• I = V+R

• I = V/R

What happens to the voltage across each component in a series circuit?

• The voltage remains constant across all components.

• The voltage is only present at the first component.

• The voltage across each component is divided based on its resistance.

• The voltage is equal to the sum of all resistances.

How does the brightness of bulbs compare in series and parallel circuits?

• Bulbs are dimmer in parallel circuits than in series circuits.

• Bulbs in series circuits are brighter than in parallel circuits.

• Bulbs are equally bright in both circuits.

• Bulbs are brighter in parallel circuits than in series circuits.