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Capacitors(Engineering > Electrical Engineering ) Questions and Answers
Home
Topic
Engineering
Electrical Engineering
Capacitors
Question 1.
A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is
3 V
6 V
4 V
0 V
Explanation:-
Answer: Option B. ->
6 V
Question 2.
What is the capacitance when Q = 60 µC and V = 12 V?
720 µF
5 µF
50 µF
12 µF
Explanation:-
Answer: Option B. ->
5 µF
Question 3.
Voltage leads current by 90° in a capacitor.
True
False
Explanation:-
Answer: Option B. ->
False
Question 4.
Five time constants are required for a capacitor to charge fully or discharge fully.
True
False
Explanation:-
Answer: Option A. ->
True
Question 5.
A capacitor of 2,000 pF is greater than
0.02 µF
0.002 µF
0.0002 µF
0.0000002 F
Explanation:-
Answer: Option C. ->
0.0002 µF
Question 6.
A capacitor of 0.02 µF is larger than
0.000020 F
200,000 pF
2,000 pF
All of the above
Explanation:-
Answer: Option C. ->
2,000 pF
Question 7.
The true power in a capacitor is zero.
True
False
Explanation:-
Answer: Option A. ->
True
Question 8.
A capacitor blocks A.C. but passes D.C.
True
False
Explanation:-
Answer: Option B. ->
False
Question 9.
Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is
46.8 Ω
4.68 Ω
23.41 Ω
11.70 Ω
Explanation:-
Answer: Option A. ->
46.8 Ω
Question 10.
A 0.47 µF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is
170 Ω
17 Ω
0.000169 Ω
1.7 Ω
Explanation:-
Answer: Option A. ->
170 Ω
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