ISCET Electronic Components & Circuit Analysis

Question 1

What is the function of a capacitor in an electronic circuit?

Accepted Answer

To store and release electrical energy

Answer

A capacitor is a passive electronic component designed to store electrical energy in an electric field. It consists of two conductive plates separated by a dielectric material. This stored energy can then be released back into the circuit, making capacitors essential for filtering, timing, and energy storage applications in various electronic circuits.

Question 2

What happens when a diode is forward biased?

Accepted Answer

It allows current to flow

Answer

A diode is a semiconductor device that acts as a one-way valve for electric current. When a diode is forward biased, meaning the voltage applied across it is in the correct direction (positive to anode, negative to cathode), it allows current to flow through it with minimal resistance. Conversely, it blocks current when reverse biased.

Question 3

What is Ohm’s Law?

Accepted Answer

V = IR

Answer

Ohm's Law is a fundamental principle in electronics that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The formula V = IR states that the voltage across a conductor is directly proportional to the current flowing through it, given a constant resistance. This law is crucial for analyzing and designing circuits.

Question 4

Which component is used to resist current in a circuit?

Accepted Answer

Resistor

Answer

A resistor is a passive two-terminal electrical component specifically designed to oppose or limit the flow of electric current in a circuit. It introduces electrical resistance, which converts some electrical energy into heat. Resistors are used to control current levels, divide voltage, and protect other components from excessive current.

Question 5

What is the unit of electrical resistance?

Accepted Answer

Ohm

Answer

The Ohm (symbol Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm. It quantifies how much a material or component opposes the flow of electric current. One Ohm is defined as the resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces a current of one ampere.

(ISCET) International Society of Certified Electronics Technicians Practice Test

(ISCET) International Society of Certified Electronics Technicians Practice Test

ISCET Electronic Components & Circuit Analysis