RC Circuits MCQ Questions & Answers | Electrical Engineering Page-3 section-1

21.
A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?

A. 129 Ω

B. 12.9 Ω

C. 167 Ω

D. 73 Ω

Answer & Solution Discuss in Board Save for Later

22.
In the complex plane, the number 4 + j3 is located in the

A. First quadrant

B. Second quadrant

C. Third quadrant

D. Fourth quadrant

Answer & Solution Discuss in Board Save for Later

23.
In the complex plane, the number 14 - j5 is located in the

A. First quadrant

B. Second quadrant

C. Third quadrant

D. Fourth quadrant

Answer & Solution Discuss in Board Save for Later

24.
The polar form of a complex number consists of a real part and a j part.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

25.
Complex numbers can be added and subtracted but not multiplied or divided.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

26.
In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is

A. 3 V

B. 27 V

C. 19.2 V

D. 1.9 V

Answer & Solution Discuss in Board Save for Later

27.
An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:

A. R = X_C

B. R > X_C

C. R < X_C

D. R = 5X_C

Answer & Solution Discuss in Board Save for Later

28.
A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is

A. 9.2 mA

B. 92 mA

C. 4.6 mA

D. 460 mA

Answer & Solution Discuss in Board Save for Later

29.
The power factor (PF) indicates how much of the apparent power is true power.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

30.
A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is

A. Z = 47 Ω + j150 Ω

B. Z = 47 Ω - j150 Ω

C. Z = 197 Ω

D. Z = 103 Ω

Answer & Solution Discuss in Board Save for Later

RC Circuits MCQ Questions & Answers | Electrical Engineering

21. A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?

Answer & Solution

22. In the complex plane, the number 4 + j3 is located in the

Answer & Solution

23. In the complex plane, the number 14 - j5 is located in the

Answer & Solution

24. The polar form of a complex number consists of a real part and a j part.

Answer & Solution

25. Complex numbers can be added and subtracted but not multiplied or divided.

Answer & Solution

26. In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is

Answer & Solution

27. An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:

Answer & Solution

28. A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is

Answer & Solution

29. The power factor (PF) indicates how much of the apparent power is true power.

Answer & Solution

30. A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is

Answer & Solution

21.
A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?

22.
In the complex plane, the number 4 + j3 is located in the

23.
In the complex plane, the number 14 - j5 is located in the

24.
The polar form of a complex number consists of a real part and a j part.

25.
Complex numbers can be added and subtracted but not multiplied or divided.

26.
In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is

27.
An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:

28.
A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is

29.
The power factor (PF) indicates how much of the apparent power is true power.

30.
A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is