Polytechnic Electronics and Electrical Engineering 2

Question 1

What does AC stand for in electrical engineering?

Accepted Answer

Alternating Current

Answer

Amplified Current

Answer

Automatic Control

Answer

Applied Circuit

Question 2

Kirchhoff's Current Law (KCL) states that:

Accepted Answer

The sum of currents entering a node equals the sum leaving it

Answer

Voltage around a closed loop equals zero

Answer

Resistance increases with temperature

Answer

Power equals voltage times time

Question 3

What is the capacitance of a capacitor that stores 0.01 coulombs of charge at 5 volts?

Accepted Answer

0.002 F

Answer

0.0005 F

Answer

0.05 F

Answer

50 F

Question 4

An NPN transistor is in saturation mode when:

Accepted Answer

Both junctions are forward-biased

Answer

Both junctions are reverse-biased

Answer

The base-emitter junction is forward-biased and base-collector is reverse-biased

Answer

No base current is applied

Question 5

What is the purpose of a voltage divider circuit?

Accepted Answer

To produce a lower output voltage from a higher input voltage

Answer

To increase current in a branch

Answer

To store electrical energy

Answer

To convert AC to DC

Question 6

What does an ammeter measure and how is it connected in a circuit?

Accepted Answer

Current; connected in series

Answer

Voltage; connected in parallel

Answer

Resistance; connected in series

Answer

Power; connected in parallel

Question 7

Which logic gate outputs HIGH only when all inputs are HIGH?

Accepted Answer

AND gate

Answer

OR gate

Answer

NAND gate

Answer

NOR gate