Question 1

A circuit with no connection or path for current to flow is called:

Question 2

If the voltage remains constant and the resistance in a circuit increases, the current will:

Question 3

Which of the following is a good conductor of electricity?

Question 4

Which device is used to measure electrical current in a circuit?

Question 5

Which law states that the current passing through two points in a conductor is directly proportional to the voltage across the two points?

Question 6

A parallel circuit is one in which:

Question 7

Which of the following components is used to store electrical energy in an electrostatic field?

Question 8

Which principle states that the induced electromotive force (EMF) in any closed circuit is equal to the negative rate of change of the magnetic flux enclosed by the circuit?

Question 9

In an electrical circuit, what component is used to convert electrical energy into mechanical energy?

Question 10

If two resistors, each of 4 Ohms, are connected in parallel in a circuit, what is the total resistance of the circuit?

Question 11

Which component in an electrical circuit provides opposition to the flow of alternating current (AC) due to capacitance or inductance?

Question 12

What is the unit of electric potential difference?

Question 13

A device that increases or decreases the voltage of an alternating current (AC) by mutual induction between primary and secondary windings is known as:

Question 14

What is the primary function of a fuse in an electrical circuit?

Question 15

In a direct current (DC) circuit, if the resistance is doubled while the voltage remains constant, the current will:

Question 16

If two identical bulbs are connected in series to a battery, how would their brightness compare to a single bulb connected to the same battery?

Question 17

A switch that is designed to divert current from one circuit path to another is known as:

Question 18

Which of the following best describes the primary role of a capacitor in an electrical circuit?

Question 19

If a transformer has 100 primary windings and 200 secondary windings, and the input voltage is 50 volts, what will be the output voltage?

Question 20

What happens to the resistance of a metal conductor as its temperature increases?

Question 21

An electrical circuit contains a coil of wire, a resistor, and a capacitor, all connected in series. If the coil produces an inductive reactance and the capacitor produces a capacitive reactance, which statement is true regarding the total impedance of the circuit?

Question 22

In a three-phase power system, if one phase suddenly becomes open-circuited, what will most likely happen to the power delivered to a three-phase balanced load?

Question 23

What would likely happen in a parallel circuit if one of the branches was removed?

Question 24

If a relay coil is energised and it consequently closes its normally open contacts, which type of device can it be best described as?

Question 25

A parallel RLC circuit is in resonance. Which of the following statements best describes the relationship between the inductive and capacitive reactance at resonance?

Question 26

In a step-down transformer, if the primary coil has 1000 turns and the secondary coil has 250 turns, how will the input and output voltages relate?

Question 27

Which of the following materials has the highest resistivity?

Question 28

What would be the potential difference across a 5-ohm resistor carrying a current of 3 amperes?

Question 29

A circuit consists of two resistors in series: one of 4 ohms and another of 6 ohms. What is the total resistance of this series combination?

Question 30

If you replace a single-pole switch with a two-pole switch in a circuit, how would the operation of the connected device be affected when the switch is toggled?