Ham Radio Technician Test Basic Electronics & Circuitry 4

Question 1

What is the effect of adding a capacitor in series with an antenna feedline for DC blocking?

Accepted Answer

It passes RF while blocking DC

Answer

It amplifies the RF signal

Answer

It blocks RF while passing DC

Answer

It increases the antenna's resonant frequency

Question 2

What is the power factor of a purely resistive AC circuit?

Accepted Answer

1

Answer

0

Answer

0.5

Answer

Infinity

Question 3

Which semiconductor device is commonly used as a voltage-controlled switch in digital logic?

Accepted Answer

MOSFET

Answer

Zener diode

Answer

Varactor diode

Answer

SCR

Question 4

What is the purpose of a decoupling capacitor placed near an IC power pin?

Accepted Answer

Filter high-frequency noise and supply instantaneous current

Answer

Increase the supply voltage to the IC

Answer

Reduce the clock speed of the IC

Answer

Convert AC supply to DC for the IC

Question 5

What does the 'Q' factor of a coil or resonant circuit indicate?

Accepted Answer

The ratio of reactance to resistance, indicating selectivity and efficiency

Answer

The charge stored in coulombs

Answer

The number of turns in the coil

Answer

The maximum current the coil can carry

Question 6

In which region does a transistor operate when used as a linear amplifier?

Accepted Answer

Active (linear) region

Answer

Saturation region

Answer

Cutoff region

Answer

Breakdown region

Question 7

What is electrical impedance?

Accepted Answer

The total opposition to AC current including resistance and reactance

Answer

Resistance to DC current only

Answer

The power dissipated in a circuit

Answer

The ratio of current to voltage