Understanding Electricity Concepts

What is the total resistance in a series circuit with three resistors of 2Ω, 3Ω, and 5Ω?

• 7Ω

• 5Ω

• 10Ω

• 8Ω

In a parallel circuit, if one branch has a resistance of 4Ω and another has 6Ω, what is the total resistance?

• 3Ω

• 10Ω

• 1Ω

• 2.4Ω

What happens to the total current in a series circuit if an additional resistor is added?

• The total current remains the same.

• The total current increases.

• The total current fluctuates.

• The total current decreases.

In a parallel circuit, how does the voltage across each branch compare to the total voltage?

• The voltage across each branch is equal to the total voltage.

• The voltage across each branch is half of the total voltage.

• The voltage across each branch is zero.

• The voltage across each branch varies and is less than the total voltage.

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

• R_total = R1 * R2 * R3 * ... * Rn

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

• R_total = R1 - R2 - R3 - ... - Rn

• R_total = R1 + R2 + R3 + ... + Rn

How does adding more branches in a parallel circuit affect the total current?

• The total current remains constant regardless of the number of branches in a parallel circuit.

• Adding more branches has no effect on the total current in a parallel circuit.

• Adding more branches increases the total current in a parallel circuit.

• Adding more branches decreases the total current in a parallel circuit.

What is the main advantage of using parallel circuits over series circuits?

• Lower resistance in the circuit.

• Higher current flow through each component.

• Easier to troubleshoot individual components.

• Increased reliability and consistent voltage across components.

What is the purpose of a fuse in an electrical circuit?

• To store electrical energy for later use.

• To increase the voltage in the circuit.

• To enhance the circuit's efficiency.

• The purpose of a fuse in an electrical circuit is to protect the circuit from overcurrent by breaking the circuit when the current exceeds a safe level.

According to Ohm's Law, what is the relationship between voltage, current, and resistance?

• Voltage (V) = Resistance (R) / Current (I)

• Current (I) = Voltage (V) + Resistance (R)

• Resistance (R) = Voltage (V) - Current (I)

• Voltage (V) = Current (I) * Resistance (R)

If a circuit has a voltage of 12V and a resistance of 3Ω, what is the current flowing through the circuit?

• 4A

• 2A

• 6A

• 8A