Practice Pakistan's most useful MCQs for competitive exams

A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage?

• (A)  1 MΩ
• (B)  24 kΩ
• (C)  18 kΩ
• (D)  12 kΩ

Answer

Submitted By :Ali Uppal

A series resonant band-pass filter consists of a 2 mH coil, a 0.005 µF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?

• (A)  10.9 V
• (B)  1.09 V
• (C)  1.1 V
• (D)  12 V

Answer

Submitted By :Ali Uppal

A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?

• (A)  1.1 mV
• (B)  11.1 mV
• (C)  111 mV
• (D)  200 mV

Answer

Submitted By :Ali Uppal

In a certain low-pass filter, fc = 3.5 kHz. Its passband is____________?

• (A)  3.5 kHz
• (B)  0 Hz
• (C)  0 Hz to 3.5 kHz
• (D)  7 kHz

Answer

Submitted By :Ali Uppal

In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency_____________?

• (A)  is 7 kHz
• (B)  is 10 kHz
• (C)  is 12 kHz
• (D)  cannot be determined

Answer

Submitted By :Ali Uppal

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V.the filter’s bandwidth is____________?

• (A)  530 Hz
• (B)  106 Hz
• (C)  11.5 Hz
• (D)  53 Hz

Answer

Submitted By :Ali Uppal

The first goal to accomplish in analyzing a complex series-parallel circuit is to____________?

• (A)  solve for all the voltage drops
• (B)  solve for the total current and resistance
• (C)  equate all series components
• (D)  equate all parallel components

Answer

Submitted By :Ali Uppal

The positive (+) and negative (-) ends of the battery are called ___________?

• (A)  circuit diagram
• (B)  battery knobs
• (C)  battery terminals
• (D)  battery sides

Answer

Submitted By :Ali Uppal

When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read_____________?

• (A)  twice the source voltage
• (B)  half the source voltage
• (C)  zero volts
• (D)  the same as the source voltage

Answer

Submitted By :Ali Uppal

In a series–parallel circuit, individual component power dissipation are calculated using_____________?

• (A)  individual component parameters
• (B)  a percent of the total power depending on resistor ratios
• (C)  total current squared multiplied by the resistor values
• (D)  a percent of the voltage division ratio squared

Answer

Submitted By :Ali Uppal