Free IEM Electrical Systems & Circuit Analysis Questions and Answers

Question 1

What does Ohm's Law relate in an electrical circuit?

Accepted Answer

Voltage, current, and resistance

Answer

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. It is mathematically expressed as V = I * R, meaning voltage is directly proportional to current and resistance.

Question 2

In a series circuit, how does the total resistance compare to individual resistances?

Accepted Answer

It is the sum of all resistances.

Answer

In a series circuit, components are connected end-to-end, forming a single path for current flow. The total resistance of the circuit is found by simply adding up the individual resistances of each component, as each resistor contributes to the overall opposition to current.

Question 3

What is the main function of a capacitor in an AC circuit?

Accepted Answer

To store electrical charge

Answer

A capacitor is an electronic component designed to store electrical energy in an electric field. In an AC circuit, capacitors repeatedly charge and discharge, allowing them to block DC current while passing AC current, and are used for filtering, timing, and energy storage.

Question 4

Which device is used to measure current in a circuit?

Accepted Answer

Ammeter

Answer

An ammeter is a specialized measuring instrument used to determine the electric current flowing through a point in a circuit. It is always connected in series with the circuit component through which the current is to be measured, to ensure all the current passes through it.

Question 5

What happens to total current in a parallel circuit when more branches are added?

Accepted Answer

It increases.

Answer

In a parallel circuit, adding more branches provides additional paths for current to flow. Each new branch effectively reduces the overall equivalent resistance of the circuit, which, according to Ohm's Law (I=V/R), results in an increase in the total current drawn from the power source.

IEM - Industrial Electronic Maintenance Technician Practice Test

IEM - Industrial Electronic Maintenance Technician Practice Test

Free IEM Electrical Systems & Circuit Analysis Questions and Answers