Capacitors electronic interview question

51.

What is the circuit’s impedance?

A.     1192
B.     843
C.     723
D.     511
Answer & Explanation

Answer: Option A

Explanation:

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52.

In an ac circuit, a capacitor and an output resistor are connected in series with an ac signal. What filter action will be the result?
A.     bandpass    B.     low-pass
C.     high-pass    D.     band-stop
Answer & Explanation

Answer: Option C

Explanation:

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53.

What is the impedance of this circuit?

A.     5928
B.     2000
C.     1902
D.     1798
Answer & Explanation

Answer: Option A

Explanation:

Impedance Cannot be Directly Measured, We Need to find Xc first.

So,

Xc = 1/2πfC.

Xc = 1/( 2 x 3.14 x 5000 x 0.01 x 10-6 ).

Xc = 3184.7.

Z = Sqrt( Xc2 + R2 ).

Z = Sqrt( 3184.72 + 50002 ).

Z = 5928 Ω.

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54.

What is the reactive power?

A.     6.8 mW
B.     9.8 mW
C.     12.8 mW
D.     15.8 mW
Answer & Explanation

Answer: Option B

Explanation:

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55.

A practical capacitor
A.     is a short to dc
B.     looks like a capacitor in parallel with a resistor
C.     is an open to ac
D.     stores energy in a magnetic field
Answer & Explanation

Answer: Option B

Explanation:

No answer description available for this question

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