Basics of Electricity and Circuits

What is Ohm's Law?

• Ohm's Law states that R = V / I.

• Ohm's Law is I = V + R.

• Ohm's Law defines power as P = I * R.

• Ohm's Law is V = I * R.

What is the unit of voltage?

• Volt

• Watt

• Ohm

• Joule

Which component provides voltage in a circuit?

• Inductor

• Capacitor

• Power source (e.g., battery or power supply)

• Resistor

What is the formula for calculating resistance?

• R = V / I

• R = V + I

• R = V * I

• R = I / V

In a series circuit, how is the total resistance calculated?

• 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

What does Kirchhoff's Voltage Law state?

• The total current in a circuit is constant.

• The power in a circuit is always positive.

• The resistance in a closed loop is zero.

• The sum of the voltages around a closed loop is zero.

What is the unit of current?

• Volt (V)

• Watt (W)

• Ampere (A)

• Ohm (Ω)

How does current flow in a closed circuit?

• Current does not require a voltage source to flow in a circuit.

• Current flows in a closed circuit as a continuous loop driven by voltage.

• Current flows only in one direction without a complete path.

• Current can flow in an open circuit if there is enough voltage.

What happens to the total resistance when resistors are added in series?

• The total resistance decreases.

• The total resistance fluctuates.

• The total resistance increases.

• The total resistance remains the same.

What does Kirchhoff's Current Law state?

• The total current in a closed loop is zero.

• The total current entering a junction equals the total current leaving the junction.

• The total resistance at a junction equals the total resistance leaving the junction.

• The total voltage entering a junction equals the total voltage leaving the junction.