Understanding Basic Electricity

What is the main difference between series and parallel circuits?

• The main difference is that series circuits have a single path for current, while parallel circuits have multiple paths.

• Series circuits are always more efficient than parallel circuits.

• Parallel circuits have a single path for current.

• Series circuits can have multiple paths for current.

In a series circuit, how does the total resistance compare to individual resistances?

• The total resistance is equal to the sum of individual resistances.

• The total resistance is less than the smallest individual resistance.

• The total resistance is greater than the individual resistances.

• The total resistance is the same as the largest individual resistance.

What happens to the total current in a parallel circuit when more branches are added?

• The total current remains the same regardless of branches added.

• The total current decreases when more branches are added.

• The total current fluctuates randomly with added branches.

• The total current increases when more branches are added.

Define voltage in the context of an electrical circuit.

• Voltage is the electric potential difference between two points in a circuit.

• Voltage is the measure of current flow in a circuit.

• Voltage is the resistance offered by a circuit component.

• Voltage is the total energy consumed by a circuit.

What unit is used to measure electrical current?

• ohms

• amperes

• volts

• watts

How does resistance affect the flow of current in a circuit?

• Resistance only affects voltage, not current.

• Resistance increases the flow of current in a circuit.

• Resistance decreases the flow of current in a circuit.

• Resistance has no effect on the flow of current in a circuit.

In a series circuit with three resistors, if one resistor fails, what happens to the circuit?

• The circuit will continue to function normally.

• The circuit will short circuit and create a spark.

• The circuit will stop functioning.

• The circuit will increase its current flow.

What is the formula for calculating total resistance in a series circuit?

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

• R_total = R1 + R2 + R3 + ... + Rn

• R_total = R1 - R2 - R3 - ... - Rn

• R_total = R1 * R2 * R3 * ... * Rn

How does the voltage across each component in a parallel circuit compare?

• The voltage is zero across all components.

• The voltage across each component in a parallel circuit is the same.

• The voltage varies across each component.

• Only one component has the full voltage.

What is Ohm's Law and how is it expressed mathematically?

• Ohm's Law is expressed mathematically as V = I * R.

• V = R / I

• I = V + R

• R = V - I