ASVAB Electronics 4

Question 1

What is the purpose of a bypass capacitor placed across a power supply pin on an integrated circuit?

Accepted Answer

To filter out high-frequency noise on the supply line

Answer

Bypass capacitors provide a low-impedance path to ground for high-frequency noise, keeping the supply voltage clean and stable.

Question 2

In a transistor amplifier circuit, what region of operation is the transistor in when it acts as a switch in the 'ON' state?

Accepted Answer

Saturation

Answer

In saturation, both junctions are forward-biased and the transistor conducts maximally, acting like a closed switch.

Question 3

What is the unit of inductance?

Accepted Answer

Henry

Answer

Inductance is measured in henries (H), named after Joseph Henry who discovered electromagnetic induction independently.

Question 4

Two resistors of 6Ω and 3Ω are connected in parallel. What is the equivalent resistance?

Accepted Answer

2Ω

Answer

For parallel resistors: 1/R = 1/6 + 1/3 = 1/6 + 2/6 = 3/6, so R = 2Ω.

Question 5

Which type of logic gate produces a HIGH output only when ALL inputs are HIGH?

Accepted Answer

AND gate

Answer

An AND gate output is HIGH (1) only when every input is HIGH (1); any LOW input forces the output LOW.

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