Summative Exam 3 Practice Test

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What is the cutoff frequency of the circuit in the given figure?

0 Hz
21 Hz
60 Hz
365 Hz (correct)

What is the resistance of the resistor in a circuit if the admittance is given as (0.040 + 𝑗0.025)𝑆?

9 ohms
25 ohms
12.5 ohms
18 ohms (correct)

What is the phasor voltage V_AB (in volts) in the AC network shown in the figure?

0
17∠30° (correct)
5∠30°
12.5∠30°

What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals with two 10 H inductors in parallel and a third 10 H inductor in series?

660 kΩ (B) Signup and view all the answers

Calculate the bandwidth of a filter constructed from a coil having 100 mH inductance and 30 ohms series resistance in parallel with a 0.8 uF capacitor.

47.75 Hz (B) Signup and view all the answers

What will be the wavelength of the signal emitted by a GaAs diode?

869 nm (C) Signup and view all the answers

What is the reverse saturation current at 40°C for the same bias in a silicon (PN) junction with a reverse saturation current of 10 pico Ampere at 20°C?

30 pA (C) Signup and view all the answers

In a series RLC circuit with a resonance frequency of 1 kHz and a quality factor Q = 100, if each of R, L, and C is doubled from its original value, what is the new Q of the circuit?

200 (A) Signup and view all the answers

What is the voltage available from the diode voltage doubler if the secondary voltage of the transformer connected to its input is 120 V (rms)?

240 V (D) Signup and view all the answers

In the circuit shown in the figure, A1, A2, and A3 are ideal ammeters. If A1 reads 5 A and A2 reads 12 A, what should A3 read?

13 A (D) Signup and view all the answers

Determine the total current in the circuit shown in the figure.

6.67 A (D) Signup and view all the answers

In the given circuit, what does IT equal to?

1.5 A (A) Signup and view all the answers

Which of the following does not result from adding an acceptor impurity?

The substance has an electron surplus. (C) Signup and view all the answers

What is the type of filter shown in the figure?

Low pass filter (B) Signup and view all the answers

What is the peak factor of a sine waveform?

1.414 (C) Signup and view all the answers

Cutoff Frequency

The frequency at which the circuit's output signal is reduced by 3 dB compared to its maximum value.

Resistance from Admittance

The reciprocal of the admittance, measured in ohms.

Phasor Voltage V_AB

The voltage across the points A and B in the circuit, represented as a complex number with magnitude and angle.

Total Reactance (Inductive Circuit)

The total opposition offered by the circuit to the flow of alternating current. In this case, it is the combination of the reactances of the inductors.