Practice Pakistan's most useful MCQs for competitive exams

Two 3.3 kΩ resistors are in series and this series combination is in parallel with a 4.7 kΩ resistor. The voltage across one of the 3.3 kΩ resistors is 12 V. The voltage across the 4.7 kΩ resistor is_________?

• (A)  24 V
• (B)  12 V
• (C)  0 V
• (D)  6 V

Answer

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The current flowing through an unloaded voltage divider is called the____________?

• (A)  bleeder current
• (B)  load current
• (C)  resistor current
• (D)  voltage current

Answer

Submitted By :Ali Uppal

With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?

• (A)  200 mA
• (B)  400 mA
• (C)  600 mA
• (D)  800 mA

Answer

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If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?

• (A)  cannot tell
• (B)  remains the same
• (C)  increases
• (D)  decreases

Answer

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A Wheatstone bridge can be used to determine an unknown_____________?

• (A)  current
• (B)  voltage
• (C)  resistance
• (D)  power

Answer

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A device able to supply electrical energy is a __________?

• (A)  nonconductor
• (B)  battery
• (C)  conductor
• (D)  microwave

Answer

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A 6 V battery output is divided down to obtain two output voltages. Three 2.2 kΩ resistors are used to provide the two taps. The two output voltages are___________?

• (A)  2 V, 4 V
• (B)  2 V, 2 V
• (C)  2 V, 6 V
• (D)  4 V, 6 V

Answer

Submitted By :Ali Uppal

The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is_____________?

• (A)  20,000 Ω
• (B)  100,000 Ω
• (C)  200,000 Ω
• (D)  1,000,000 Ω

Answer

Submitted By :Ali Uppal

A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

• (A)  1 MΩ
• (B)  100 kΩ
• (C)  1 kΩ
• (D)  330 Ω

Answer

Submitted By :Ali Uppal

Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is____________?

• (A)  138 Ω
• (B)  1,389 Ω
• (C)  5,700 Ω
• (D)  880 Ω

Answer

Submitted By :Ali Uppal