Practice Pakistan's most useful MCQs for competitive exams

The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?

• (A)  5 mV
• (B)  2 mV
• (C)  8 mV
• (D)  5 mV

Answer

Submitted By :Ali Uppal

The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is___________?

• (A)  1,650 Ω
• (B)  1,078 Ω
• (C)  77.8 Ω
• (D)  778 Ω

Answer

Submitted By :Ali Uppal

The parallel combination of a 470 Ω resistor and a 1.5 kΩ resistor is in series with the parallel combination of five 1 kΩ resistors. The source voltage is 50 V. The percentage of the load current through any single 1 KΩ resistor is__________?

• (A)  25 %
• (B)  20 %
• (C)  100 %
• (D)  50 %

Answer

Submitted By :Ali Uppal

On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?

• (A)  1 V
• (B)  50 V
• (C)  500 V
• (D)  1,000 V

Answer

Submitted By :Ali Uppal

The parallel combination of a 6.8 kΩ resistor and a 10 kΩ resistor is in series with the parallel combination of a 2.2 kΩ resistor and a 1 kΩ resistor. A 100 V source is connected across the circuit. The resistor(s) with the greatest voltage drop is (are)___________?

• (A)  6.8 kΩ
• (B)  2.2 kΩ
• (C)  6.8 kΩ and 10 kΩ
• (D)  2.2 kΩ and 1 kΩ

Answer

Submitted By :Ali Uppal

The parallel combination of a 470 Ω resistor and a 1.2 kΩ resistor is in series with the parallel combination of three 3 kΩ resistors. A 200 V source is connected across the circuit. The resistor with the most current has a value of____________?

• (A)  470 Ω or 1.2 kΩ
• (B)  3 kΩ
• (C)  470 Ω
• (D)  1.2 kΩ

Answer

Submitted By :Ali Uppal

A balanced Wheatstone bridge consists of an RV of 3,500 Ω, an R2 of 200 Ω, and an R3 of 680 Ω. The value of RUNK is____________?

• (A)  680 Ω
• (B)  1,029 Ω
• (C)  200 Ω
• (D)  880 Ω

Answer

Submitted By :Ali Uppal

In a certain five-step R/2R ladder network, the smallest resistor value is 1 kΩ. The largest value is___________?

• (A)  Indeterminable
• (B)  2 kΩ
• (C)  10 kΩ
• (D)  20 kΩ

Answer

Submitted By :Ali Uppal

Three 10 kΩ resistors are connected in series. A 20 kΩ resistor is connected in parallel across one of the 10 kΩ resistors. The voltage source is 24 V. The total current in the circuit is___________?

• (A)  900 μA
• (B)  9 mA
• (C)  90 mA
• (D)  800 μA

Answer

Submitted By :Ali Uppal

A voltage divider consists of two 100 kΩ resistors and a 12 V source. What will the output voltage be if a load resistor of 1 MΩ is connected to the output?

• (A)  0.57 V
• (B)  6 V
• (C)  12 V
• (D)  5.7 V

Answer

Submitted By :Ali Uppal