Deck 5: Inductors, Rlc Circuits, Resonancediodes and Applications

Question 1

If a forward biased silicon diode is in series with a 22 k? resistor and a 10 V source, the voltage across the diode is ________ and the voltage across the resistor is ________.

A) 0.3 V, 9.7 V
B) 0.7 V, 9.3 V
C) 9.3 V, 0.7 V
D) 9.7 V, 0.3 V

Answer 1

0.7 V, 9.3 V

Question 2

The formula for line regulation is:

A) × 100%.
B) × 100%.
C) × 100%.
D) × 100%.

Answer 2

× 100%.

Question 3

The formula for load regulation is:

A) × 100%
B) × 100%.
C) × 100%
D) × 100%

Answer 3

× 100%.

Question 4

If the resonant frequency is 1 MHz and Q = 50, f₁ = ________ and f₂ = ________.

A) 0.99 MHz, 1.01 MHz
B) 0.98 MHz, 1.01 MHz
C) 0.98 MHz, 1.02 MHz
D) 0.99 MHz, 1.02 MHz

Question 5

If two 2.5 mH inductors are connected in series with a 4.7 k? resistor and the source voltage is 100 V_DC, what is the circuit's maximum current?

A) 21.3 mA
B) 1.1 mA
C) 63.2 mA
D) 7.9 mA

Question 6

An 0.05 ?H inductance is larger than a ________.

A) 0.00005 H inductance
B) 0.000000008 H inductance
C) 0.000005 H inductance
D) 0.0000005 H inductance

Question 7

If a 15 ?H inductor has a 2.2 K? reactance, the frequency equals ________.

A) 4.28 kHz
B) 23.3 MHz
C) 23.3 kHz
D) 4.28 MHz

Question 8

The time constant of an inductor is:

A) inversely proportional to the resistance in the circuit.
B) directly proportional to the inductance in the circuit.
C) the time required for voltage or current to increase to 63% or to decrease to 37%.
D) all of these.

Question 9

The quality factor of a coil or inductor is calculated by:

A) Q_L = 2? fL/R_W.
B) Q_L =

C) Q_L =

D) Q_L = 2? fL.