ISCET Electronic Components & Circuit Analysis 4

Question 1

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

Accepted Answer

2 kΩ

Answer

9 kΩ

Answer

4.5 kΩ

Answer

1.5 kΩ

Question 2

What is the impedance of a pure inductor at DC (0 Hz)?

Accepted Answer

Zero

Answer

Infinite

Answer

Equal to its inductance in ohms

Answer

Equal to its DC resistance only

Question 3

In a BJT, the current gain β (beta) is defined as:

Accepted Answer

IC / IB

Answer

IE / IB

Answer

IC / IE

Answer

IB / IC

Question 4

An electrolytic capacitor is installed with reversed polarity in a DC circuit. What will most likely occur?

Accepted Answer

It may overheat and fail catastrophically

Answer

It will work normally but with reduced capacitance

Answer

It will act as a resistor

Answer

It will simply block current flow

Question 5

What is the resonant frequency of a circuit with L = 10 mH and C = 10 μF?

Accepted Answer

503 Hz

Answer

159 Hz

Answer

1592 Hz

Answer

5033 Hz

Question 6

Which diode characteristic curve region allows the diode to be used as a variable capacitor (varactor)?

Accepted Answer

Reverse bias region below breakdown

Answer

Forward bias region

Answer

Zener breakdown region

Answer

Avalanche breakdown region

Question 7

Kirchhoff's Voltage Law (KVL) states that:

Accepted Answer

The algebraic sum of voltages around any closed loop equals zero

Answer

The sum of currents entering a node equals the sum leaving

Answer

Voltage across parallel branches is always equal

Answer

Total resistance in a loop equals total voltage divided by current