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 ________.&#10;A) 0.3 V, 9.7 V&#10;B) 0.7 V, 9.3 V&#10;C) 9.3 V, 0.7 V&#10;D) 9.7 V, 0.3 V

Accepted Answer

When a silicon diode is forward biased, it typically has a voltage drop of about 0.7 V across it. The remaining voltage from the 10 V source would then drop across the resistor, which would be 9.3 V (10 V - 0.7 V = 9.3 V).

Question 2

The formula for line regulation is:&#10;A)   &#215; 100%.&#10;B)   &#215; 100%.&#10;C)   &#215; 100%.&#10;D)   &#215; 100%.

Accepted Answer

&#215; 100%.&#10;

Question 3

The formula for load regulation is:&#10;A)   &#215; 100%&#10;B)   &#215; 100%.&#10;C)   &#215; 100%&#10;D)   &#215; 100%

Accepted Answer

&#215; 100%.&#10;

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

Accepted Answer

The bandwidth (BW) of a resonant circuit is given by BW = f0/Q, where f0 is the resonant frequency and Q is the quality factor. Here, f0 = 1 MHz and Q = 50, so BW = 1 MHz / 50 = 0.02 MHz. The lower and upper frequencies of the bandwidth (f₁ and f₂, respectively) are then f0 - BW/2 = 1 MHz - 0.01 MHz = 0.99 MHz and f0 + BW/2 = 1 MHz + 0.01 MHz = 1.01 MHz, respectively.

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

Accepted Answer

In a DC circuit, inductors act as short circuits after the initial transient period. Therefore, the total resistance is 4.7 kΩ. Using Ohm's Law (I = V/R), the maximum current is 100 V / 4700 Ω = 21.3 mA.

Question 6

An 0.05 ?H inductance is larger than a ________.&#10;A) 0.00005 H inductance&#10;B) 0.000000008 H inductance&#10;C) 0.000005 H inductance&#10;D) 0.0000005 H inductance

Accepted Answer

The answer of An 0.05 ?H inductance is larger than...

Question 7

If a 15 ?H inductor has a 2.2 K? reactance, the frequency equals ________.&#10;A) 4.28 kHz&#10;B) 23.3 MHz&#10;C) 23.3 kHz&#10;D) 4.28 MHz

Accepted Answer

The answer of If a 15 ?H inductor has a...

Question 8

The time constant of an inductor is:&#10;A) inversely proportional to the resistance in the circuit.&#10;B) directly proportional to the inductance in the circuit.&#10;C) the time required for voltage or current to increase to 63% or to decrease to 37%.&#10;D) all of these.

Accepted Answer

The time constant of an inductor is indeed inversely proportional to the resistance in the circuit, directly proportional to the inductance in the circuit, and defined as the time required for the current to reach 63% of its maximum value in a growing current scenario or to decrease to 37% in a decaying current scenario. Therefore, all the given statements are correct descriptions of the inductor's time constant.

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.

Accepted Answer

The answer of The quality factor of a coil or...

Deck 5: Inductors, Rlc Circuits, Resonancediodes and Applications