Electrical Circuits Quiz

What is the unit of electrical resistance?

• Ampere (A)

• Volt (V)

• Ohm (Ω)

• Watt (W)

Which of the following materials is commonly used as an insulator in electrical circuits?

• Copper

• Aluminum

• Silver

• Rubber

What is the formula for calculating the total resistance of resistors in series?

• R_total = R1 + R2 + R3

• R_total = R1 - R2 - R3

• R_total = R1 * R2 * R3

• R_total = 1 / (1/R1 + 1/R2 + 1/R3)

In a parallel circuit, what happens to the total resistance as more resistors are added?

• It increases

• It decreases

• It remains the same

• It cannot be determined

Which of the following is true for a closed circuit?

• The flow of current is interrupted

• The flow of current is continuous

• The flow of current is reversed

• The flow of current is negligible

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

• To increase the voltage

• To regulate the current

• To store and release electrical energy

• To prevent short circuits

Which component of a circuit allows the flow of current in only one direction?

• Resistor

• Capacitor

• Diode

• Inductor

What is the relationship between current, voltage, and resistance according to Ohm's Law?

• V = IR

• I = VR

• R = IV

• V = RI

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

• To limit the voltage

• To regulate the current

• To prevent overheating

• To interrupt the flow of current in case of a fault

Which of the following circuits allows current to flow in only one path?

• Series circuit

• Parallel circuit

• Combination circuit

• Open circuit