Basic Electric Circuits

What is Ohm's Law?

• Ohm's Law is V = I * R, where V is voltage, I is current, and R is resistance.

• Ohm's Law is P = V * I, where P is power, V is voltage, and I is current.

• Ohm's Law is R = V / I, where R is resistance, V is voltage, and I is current.

• Ohm's Law is I = V / R, where I is current, V is voltage, and R is resistance.

State the mathematical formula for calculating resistance in a circuit.

• R = I/V

• R = V^2/I

• R = V/I

• R = P/I

Explain the concept of voltage drop in a series circuit.

• Voltage drop in a series circuit is the same at all points in the circuit.

• Voltage drop in a series circuit is not affected by the resistance of the components.

• Voltage drop in a series circuit is the decrease in voltage as the current flows through the circuit due to the resistance of the components.

• Voltage drop in a series circuit is the increase in voltage as the current flows through the circuit due to the resistance of the components.

How does current behave in a parallel circuit?

• The current in a parallel circuit combines and flows through one branch only.

• The current in a parallel circuit splits up and flows through each branch independently.

• The current in a parallel circuit stops flowing due to interference.

• The current in a parallel circuit reverses direction randomly.

What are Kirchhoff's Laws and how are they applied in circuit analysis?

• Kirchhoff's Laws are used to determine the resistance of a circuit

• Kirchhoff's Laws are only applicable to DC circuits

• Kirchhoff's Laws are applied in circuit analysis by using them to write equations based on current and voltage relationships in a circuit, which can then be solved to determine unknown values such as currents and voltages.

• Kirchhoff's Laws are based on the relationship between power and energy in a circuit

Calculate the total resistance in a series circuit with resistors of 4Ω, 6Ω, and 8Ω.

• 22Ω

• 20Ω

• 16Ω

• 18Ω

If two resistors of 3Ω and 6Ω are connected in parallel, what is the equivalent resistance?

• 7Ω

• 4Ω

• 5Ω

• 2Ω

In a circuit with a 12V battery, if the total resistance is 4Ω, calculate the current flowing through the circuit.

• 6A

• 2A

• 3A

• 4A

Apply Kirchhoff's Voltage Law to a closed loop circuit and explain the principle behind it.

• Kirchhoff's Voltage Law only applies to DC circuits, not AC circuits.

• Kirchhoff's Voltage Law is only valid for circuits with a single loop.

• Apply Kirchhoff's Voltage Law to a closed loop circuit involves summing up all the voltage sources and voltage drops in the loop, setting the total sum equal to zero.

• Kirchhoff's Voltage Law states that the sum of all voltages in a loop is always positive.

Discuss the advantages and disadvantages of using series and parallel circuits in practical applications.

• Advantages of parallel circuits: Limited power output

• Advantages of series circuits: Consistent current flow. Advantages of parallel circuits: Independent functioning of components.

• Disadvantages of parallel circuits: Inconsistent current flow

• Advantages of series circuits: Increased resistance