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Rc Circuits(Engineering > Electrical Engineering ) Questions and Answers
Home
Topic
Engineering
Electrical Engineering
Rc Circuits
Question 1.
A positive angle of 30° is equivalent to a negative angle of
-30°
-330°
-60°
-180°
Explanation:-
Answer: Option B. ->
-330°
Question 2.
Apparent power is expressed in watts.
True
False
Explanation:-
Answer: Option B. ->
False
Question 3.
The complex number 6 + j6 is equivalent to
6 ∠45°
36 ∠45°
8.48 ∠45°
8.48 ∠90°
Explanation:-
Answer: Option C. ->
8.48 ∠45°
Question 4.
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit
Increases
Decreases
Does not change
Decreases to zero
Explanation:-
Answer: Option A. ->
Increases
Question 5.
In an RC circuit, the impedance is determined by both the resistance and the capacitive reactance combined.
True
False
Explanation:-
Answer: Option A. ->
True
Question 6.
The capacitor voltage always leads the current by 90°.
True
False
Explanation:-
Answer: Option B. ->
False
Question 7.
In the complex plane, the number 14 - j5 is located in the Fourth quadrant
True
False
Explanation:-
Answer: Option A. ->
True
Question 8.
Total current in an RC circuit always leads the source voltage.
True
False
Explanation:-
Answer: Option A. ->
True
Question 9.
The complex number 40 ∠ 55° is equivalent to
55 + j55
40 + j40
45.88 + j65.52
22.94 + j32.76
Explanation:-
Answer: Option D. ->
22.94 + j32.76
Question 10.
A 2 kΩ resistor and a 0.002 µF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is
84.5 mW
845 mW
13 mW
130 mW
Explanation:-
Answer: Option A. ->
84.5 mW
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