CBT Electronic Fundamentals

Question 1

What is Ohm’s Law used to calculate in electrical circuits?

Accepted Answer

Voltage, current, and resistance

Answer

Ohm’s Law describes the relationship between voltage (V), current (I), and resistance (R), defined as V = IR.

Question 2

What happens to total resistance when resistors are added in parallel?

Accepted Answer

Total resistance decreases

Answer

Adding resistors in parallel decreases the total resistance because the current has multiple paths to flow.

Question 3

Which unit is used to measure electrical capacitance?

Accepted Answer

Farads

Answer

Capacitance is measured in farads (F), representing the ability of a component to store electrical charge.

Question 4

What is the purpose of a diode in a circuit?

Accepted Answer

Allows current to flow in one direction

Answer

A diode allows current to flow in one direction only, acting as a one-way valve in electronic circuits.

Question 5

What is the role of inductance in an AC circuit?

Accepted Answer

Opposes changes in current

Answer

Inductance resists changes in current and causes a phase shift between voltage and current in AC circuits.

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