Principles of Electronics

Front

What is a PNP transistor?

Back

A type of transistor that allows current to flow from the emitter to the collector when the base is low.

Front

How many diodes are needed in a full wave bridge rectifier?

Back

4 diodes are required.

Front

What is a Zener diode used for?

Back

It is used in a DC power supply to maintain a constant output voltage.

Front

Why is a full wave rectifier more efficient than a half wave rectifier?

Back

Because it utilizes both half-cycles of the input signal.

Front

If the voltage across a resistor is 10 V and the current is 1 A, what is the current when the voltage is 8 V?

Back

0.8 A.

Front

What does a diode do in an electronic circuit?

Back

It allows current to flow in one direction only.

Front

What is the function of a capacitor in electronics?

Back

It stores electrical energy and releases it when needed.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.

Front

What is a resistor?

Back

A component that resists the flow of electric current, creating a voltage drop.

Front

What is Ohm's Law?

Back

It states that Voltage (V) = Current (I) x Resistance (R).