Mechanical Aptitude Mechanical Aptitude Basic Electrical Circuits Questions and Answers 2

Question 1

In a parallel circuit with three identical resistors, what happens to the total resistance compared to a single resistor?

Accepted Answer

It becomes one-third of a single resistor

Answer

In a parallel circuit, the total resistance equals one resistor's value divided by the number of identical resistors.

Question 2

A 9-volt battery is connected to a 3-ohm resistor. What is the current flowing through the circuit?

Accepted Answer

3 amps

Answer

Using Ohm's Law (I = V/R), 9 volts divided by 3 ohms equals 3 amps.

Question 3

Which component stores electrical energy in an electric field?

Accepted Answer

Capacitor

Answer

A capacitor stores energy in an electric field between its two conductive plates separated by an insulator.

Question 4

What is the unit of measurement for electrical power?

Accepted Answer

Watt

Answer

Electrical power is measured in watts, calculated by multiplying voltage by current.

Question 5

In a series circuit, if one light bulb burns out, what happens to the other bulbs?

Accepted Answer

All other bulbs go out

Answer

In a series circuit, all components share a single current path, so a break anywhere stops current flow to all components.

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