ECT - PE8

When two resistances are connected in series:

• They must both have the same resistance values

• The voltage across each must be the same

• They must have different resistance values

• There is a only one path for current through both resistances

Calculate the total capacitance of three-30uF capacitors connected in series

• 10 uF

• 30 uF

• 60 uF

• 90 uF

The solder most commonly used in electronic assemblies is an alloy of:

• Tin and Lead

• Tin and Aluminum

• Gold and Silver

• Lead and Aluminum

The ratio of a good solder is:

• 60% Tin, 40% lead

• 63% Tin, 37% lead

• 70% Tin, 30% lead

• 40% Tin, 60% lead

What type of voltage regulator contains a voltage reference, error amplifier, sensing resistors and transistors, and a pass element in one package?

• A three-terminal regulator

• An op-amp regulator

• A switching regulator

• A Zener regulator

The regulation of short-term changes in the load resistance of a power supply is called:

• dynamic regulation

• static regulation

• analog regulation

• active regulation

Which of the following circuits gives the best regulation, under similar load conditions?

• A half-wave rectifier with a choke input filter

• A full-wave rectifier with a capacitor input filter

• A full-wave rectifier with a choke input filter

• A half-wave bridge rectifier with a capacitor input filter

The advantage of the capacitor input filter over the choke input filter is:

• lower peak rectifier currents

• a higher terminal voltage output

• better filtering action or smaller ripple voltage

• improved voltage regulation

Answer explanation

Ang choke pala ay inductor hahaha potek.

What is difference between choke and capacitor?

A capacitor is an electrical component consisting of two conductors separated by an insulator. An inductor, coil, or choke is a two-terminal device used to build various circuits.

What two ways could a dip meter be used in an amateur station?

• To measure resonant frequency of antenna traps and percentage modulation

• To measure resonant frequencies of antenna traps and to measure a tuned circuit resonant frequency

• To measure antenna resonance and impedance

• To measure antenna resonance and percentage modulation

The dip meter is most directly applicable to:

• series tuned circuits

• parallel tuned circuits

• operational amplifier circuits

• digital logic circuits