ASVAB Electronics Practice Test 3

Question 1

Which type of transistor is controlled by voltage at the gate terminal?

Accepted Answer

FET (Field Effect Transistor)

Answer

FETs (Field Effect Transistors) are voltage-controlled devices that use a gate to control current flow.

Question 2

If a circuit has a 9V battery and a 3Ω resistor, what is the current?

Accepted Answer

3A

Answer

Using Ohm's Law: I = V/R = 9V / 3Ω = 3A.

Question 3

What does AM stand for in radio communication?

Accepted Answer

Amplitude Modulation

Answer

AM stands for Amplitude Modulation, where the carrier wave's amplitude is varied to encode information.

Question 4

The color code for a resistor with bands Orange, Orange, Red is:

Accepted Answer

3,300 Ω

Answer

Orange=3, Orange=3, Red=×100 multiplier, giving 33 × 100 = 3,300 Ω.

Question 5

What is the purpose of a capacitor in a DC power supply filter?

Accepted Answer

Smooth out voltage ripple

Answer

A filter capacitor charges during voltage peaks and discharges during valleys, smoothing out ripple in DC output.

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